WWII clandestine spy radio set
The Whaddon Mark VII (Mk7), commonly known as the Paraset or Paracette (French),
is a valve-based, lightweight,
short-wave, CW-only clandestine radio transceiver
or spy radio set, for the 40 and 80 metre radio bands,
developed in 1941 by the Royal Signals Section VIII at Whaddon Hall
and Little Horwood (UK).
It was used throughout WWII by agents of the SIS (MI6) and the SOE,
who were dropped over occupied territory, and also by resistance organisations
in the countries under occupation of Nazi Germany,
in particular in Belgium, France,
The Netherlands and Norway .
The Paraset was small, lightweight and very easy to operate, but had several
disadvantages. Its valves are not permanently installed,
and have to be removed
– and stowed inside the top cover –
before the case can be closed. Furthermore, it can only
be operated in CW (morse) with the
small internal morse key at the front right.
There is no provision for an external morse key. 1
As the device has no sidetone provision either,
you can't hear your own morse code when transmitting.
But the major – and potentionally lethal – issue during WWII, is the fact
that the self-regenerative receiver unknowingly becomes a transmitter when the
regenerate control is used incorrectly.
This unwanted RF signal can be traced from some distance by means of
radio direction finding (RDF), even when the device is not
in transmit mode.
Not knowing that the Germans actively exploited this mis-feature,
many agents lost their lives as a result of it.
This was particularly the case in major urban areas, where the Germans
deployed many direction finding vehicles, and less so in distant rural areas.
In the latter part of the war,
the Paraset was therefore mainly used in Norway.
After WWII, in the early stages of the Cold War,
some Parasets were briefly (re)used by the newly established
of several European countries, including The Netherlands,
until they were replaced by better modern alternatives of domestic or
➤ Operating instructions
There are Parasets with a socket for an external morse key – located to the
right of the internal key – such as S/N 10313, but it is unknown whether this
is an original feature or an aftermarket modification .
The Paraset is one of the rarest spy radio sets of WWII
. Very few have
survived. It is also one of the most popular designs for replicas, probably
because of its aestetics and the simplicity of its circuits 
With so many reproductions and so few real devices, collectors and museums
should be careful when obtaining one.
The diagram below provides a quick overview of the controls and connections
of the Paraset, all of which are located on the top panel. At the upper edge
of this panel are three 8-pin sockets in which the valves
should be installed. The valves have to be removed
– and stowed inside the top cover – before the
case can be closed. The PSU should be connected to the
socket at the top left.
The mode of operation (receive or transmit) is determined by the position of
the MODE-selector at the centre. The receiver can freely be tuned over the
entire 3-7.6 MHz range by means of the large and small knobs at the bottom
left, using the calibration chart
inside the case lid as a guide.
The frequency of the transmitter is determined by a quartz crystal
that should be
inserted into the socket at the top right.
After connecting a suitable wire antenna and counterpoise (ground),
the oscillator and antenna adjustments at the lower edge have to be tuned for
maximum output — whilst holding down the morse key —
using the tuning indicators (lamps) to find the optimum.
- Small dimensions (probably the smallest transceiver at the time)
- Lightweight design (easy to transport and hide)
- Lightweight PSU
- Relatively high power output (5W)
- Valves accessible from the outside
- Easy to operate
- Valves have to be removed prior to closing the case
- No provision for external morse key
- No sidetone during transmission
- Potentially strong RF signal emitted from the receiver
- Under-dimensioned power supply unit
- 240V setting is actually the same as 225V setting
- Dangerous interconnection cable (the pins carry a high voltage) 1
This was corrected in later versions.
Like most Parasets, the one featured here is housed in a steel enclosure,
although some early ones were supplied in a wooden case.
It has a hinged cover
with clips to hold the valves when the device is in
transit, plus a calibration chart to convert the
linear receiver tuning scale to kHz.
Some Parasets were supplied in an unobtrusive travel suitcase
that also had space for the PSU, spare parts, wiring and
The actual transceiver is housed inside the metal (or wooden) enclosure
shown above, and is held in place by four screws (see below).
When the device is in transit, the three valves have to be removed and
should be stowed inside the cover, as shown in the image on the right.
➤ Look inside the transceiver
The Paraset contains an Audio Frequency (AF) amplifier that amplifies
the sound from the self-regenerative detector/receiver to a level that is
sufficient for high-impedance headphones.
The image on the right shows the original pair of 2000Ω headphones
that was supplied with the Paraset during WWII.
The transmitter is crystal-operated and requires a suitable quartz crystal
to be installed in the crystal socket
in the upper right corner.
The socket accepts virtually any USA/UK crystal with 3 mm pins that are
spaced 19 mm apart, such as the ones shown on the right.
Crystals with 4 mm pins, such as the
DC-34 and DC-35, will probably fit, but
are likely to damage the sockets (unless used with a 3 mm adapter).
➤ More about crystals
When the Paraset was to be used in an urban environment, it was usually
supplied with the mains power supply unit (PSU) shown in the image on the right.
At the front is a voltage selector that makes the PSU suitable for virtually
any AC mains network in the world.
The LT and HT voltages are available on the
4-pin Howard & Jones socket at the left.
A short cable is needed for connection to the Paraset.
➤ Connector pinout
The tranceiver was operated with a long wire antenna which should be
connected to the terminal marked 'A' at the upper edge. As a general
rule: the longer the wire the better. In addition, a suitable
counterpoise wire should be connected to the 'E' terminal (earth or ground).
Suitable wires are shown in the image on the right. When possible, the
ground wire should be connected to the waterpipe or the central heating system
for improved performance.
During WWII, the Paraset was supplied to a number of agents and
resistance groups in occupied European countries like France, Belgium,
Norway and The Netherlands.
From surviving accounts it is known that these devices were usually supplied
with simplified operating instructions, but to our knownledge none of these
documents appear to have survived the war. Until now that is...
In March 2021, Dutch amateur radio operator Bas Levering (PE4BAS) published
two barely readable paper sheets – titled: Instructions for working a
Paracette – which he had discovered in the legacy of Dirk Rustema,
obtained in 2019 .
During WWII, Rustema – amateur callsign PA0DR – was a
clandestine radio operator of the
Ordedienst (OD) — one of three important
resistance organisations in The Netherlands.
The Paraset was amoung the first radio sets used by the OD,
and had been smuggled into the country via
the Swedish route: by boat to Delfzijl (Netherlands).
The operating instructions for the Paraset came on two very thin folio
paper sheets – presumably carbon copies (CC) – that were folded and stapled
together. Apart from these instructions, the operator also needed a
secret code for encrypting and decrypting messages.
It consisted of the title of a
poem (or song) and a 5-digit number to mask the position of
the selected key words.
Rustema probably retained the instructions that came with his Paraset,
and rediscovered them years later, by which time
much of the text had faded [A]. It prompted him to
retype the text verbatim on his
company's stationary, and save it for the future [B].
Unfortunately however, he skipped the paragraphs that had meanwhile
become unreadable. In May 2021, Crypto Museum obtained high-quality scans of
the document from Bas Levering . Using
we were able to reconstruct most of the text and make a
nearly complete transcription [C].
➤ Download the reconstructed transcript
Note that a few comments are handwritten at the top of the original
document, probably at two different moments in time and possibly by two
First of all, the pencil-written marking S. 2441 in the top left corner.
The same reference is written twice in the
top right corner of the same page.
It is currently unclear what it means, but there are several
- The secret number for the poem code (see below)
- A production or delivery code with place/date, e.g. Sweden week 24 of 1941
- The serial number of the radio: S/N 2441
- An indicator or key for the so-called STP-code
The other comments are darker and are written in ink,
probably in Dirk Rustema's handwriting. They might have been added at a later
moment; most likely well after the war, as a reminder.
"TLK de JCD" clearly refers to the call signs used for the station (JCD)
and its counterpart (TLK). The handwritten text
"Toen onze mop een mopje was"
is the title of a famous Dutch poem that was used
for several years during the war by the British
Special Operations Executive (SOE)
and the Dutch Ordedienst (OD) for exchanging
It is part of a poem code .
➤ Poem code used by the OD
About the authenticity of the document
After carefully studying the scans of the original document, there is no
doubt at Crypto Museum that these are genuine instructions of British origin,
that date back to WWII
, possibly 1941. The typeface and the paper type is
correct for the era. The language suggest that it was written by a native
The documents are hand-typeded carbon copies (CC),
which means that typos (of which there are several) could not be corrected.
It was clearly supplied with a
Paraset, which was probably at some point in the possession of Dirk Rustema,
a Dutch amateur radio operator (PA0DR) who also acted as a clandestine radio
operator for the Dutch resistance (OD
) during the war.
It is known that during the course of the war, several
Parasets were supplied by the British SOE
to the Dutch resistance
via the so-called Swedish route: from the UK to Sweden and then by ship to
The Netherlands, where they arrived in the harbour of Delfzijl,
just 20 km east of Middelstum where Rustema lived.
It seems likely that the pencil-written marking 'S. 2441'
was already on the
document when Rustema received it, and might have been added by the SOE
when the device was assigned to Sweden. In
that case it might be a date code:
weden, week 24
But it might also be a serial number, or something else altogether.
The handwritten text "Toen onze mop een mopje was"
, is in a
different handwriting, and appears to be in ink. It is possible, if not
likely, that this was added by Rustema after the war, as a reminder
for the encryption method
they had used at that stage.
According to the post-war written account
of chief marconist Ton van Schendel
the text — a famous Dutch poem — was used as part of a secret
and the OD
. That report also confirms the use of the
Paraset by the OD
and the involvement of Dirk Rustema in this context 
The first Paraset supplied to the Netherlands and used
by Rustema, was known by the codename De Soto
The marking "TLK de JCD"
is somewhat mysterious. It is in a format that
was (and still is) commonly used in radio communication. At the time,
French was the common postal language and the word
is French for 'from'. It is certain that TLK
but it is currently unknown to whom they belonged.
Also peculiar is the word Paracette
in the title of the document.
This name was given to the device by the SOE
, who initially adopted
the device for the French resistance, but later also
deployed it in other countries 
Below is a list of confirmed users 1 of the Paraset, during and after WWII.
The device was initially developed in 1941 for the British
Secret Intelligence Service (SIS), where it was
known as Mk-VII (Mk-7). Shortly afterwards it was adopted by the British
Special Operations Executive (SOE) for operations
behind enemy lines. As the SOE commonly dropped the supplies for its
agents by parachute over occupied territory,
the Mk-VII became known as the Paraset or Paracette. 2
The device was also supplied to resistance organisations in various occupied
European countries, either directly or via the SOE. In the Netherlands for
example, the Paraset was supplied to the
Ordedienst via the so-called Swedish
route. They were delivered by boat from Sweden to Delfzijl in the
The Netherlands, from where they were distributed throughout the country.
This list is by no means complete. If you know of any further users of the
Paraset, please let us know.
Derived from French, as the SOE initially adopted the device
for use in France .
Below is the circuit diagram of the Paraset. At the left is the
transmitter, which is built around a metal 6V6 valve. At the bottom
left is the crystal. Note the twisted wire between the g1 and the anode,
which acts as a small capacitor (C3) that gets the oscillator going.
At the top left is the output transformer, that comprises a tank coil (L1a)
and an antenna coil (L1b). Each of these coils has its own pick-up loop that is
connected to a filament light bulb that acts as tuning indicator.
The receiver is at the right. It is built around two 6SK7 valves
and consists of a regenerative detector (V2) and an AF section (V3) that
amplifies the audio signal enough to drive a
pair of 2000Ω headphones. The frequency
is adjusted with C10, whilst R7 is used to find the optimum point of
regeneration. The MODE-switch (S1) selects between receiver and
transmitter. It switches the HT power (S1a) and the antenna (S1b).
In the middle position it is off. The circuit in the grey section at the top
right, derives the +245V voltage for the receiver from the +360V HT rail.
Below is the circuit diagram of the original
mains power supply unit (PSU).
It consists of a large transformer with a selection of taps on the primary
side, that makes the device compatible with virtually any AC mains network
in the world. The double capacitor (C2, C3) acts as a mains filter.
At the secondary side is a double HT winding and a separate
6V winding for the filaments of the valves. The HT voltage is rectified in
a 6X5 rectifier valve (V1) and smoothened by capacitor C1.
The output is available on a 4-pin Jones socket, whilst the
Paraset itself has a 3-pin Jones socket. A short
interconnection cable is needed to connect the two devices together.
In the initial version, the interconnection cable has plugs at both ends,
which makes it dangerous and potentially lethal. In later versions this was
solved by swapping the 3-pin plug for a 3-pin socket .
The paraset is housed in a steel rectangular container that measures
222 x 142 x 110 mm and weights 2580 grams; valves and one crystal included.
All parts are mounted to the reverse side of the control panel, which is
bolted to the metal enclosure by means of four screws at the edges.
After removing the four screws, the
interior can be lifted from the enclosure,
as shown in the image on the right. All components are soldered directly to
the bottom of the valve sockets and the connectors, or to mounting stubs or
special solder strips that are bolted to the front panel.
The large coil at the centre
is the combined oscillator/antenna coil – in
fact a transformer – which is wound onto a large paxolin cylinder.
Inside the cylinder are the pickup coils
for the two tuning indicators; one at each end.
Their filament light bulbs protrude the control panel.
Despite its age and the stress under which it was developed, the Paraset is
a service-friendly device. It is mechanically well constructed and all
components are easily accessible. Considering the fact that the device shown
here is 80+ years old (in 2021), it appears to be well preserved.
The fact that the valves are fitted at the front panel rather than inside the
enclosure, can be seen as a disadvantage (they must be removed to close the
case) but also as a feature, as they can be replaced without
dismantling the Paraset.
The power supply unit (PSU) is housed in a metal enclosure that consists of
a U-shaped base — to which all parts are mounted — and a U-shaped cover. The
cover has ventilation slots at the top and is held in place by 5 screws at the
front and 5 at the rear. After removing all 10 screws, the cover can be lifted
and the interior is exposed.
Note that the interconnection cable of the initial Parasets can be dangerous,
as it has plugs (with pins sticking out) at both ends. When the cable
is plugged into a live PSU
, the pins at the other end carry the potentially
lethal voltage of +360V. Always install both ends of the cable - before -
plugging the PSU
into the mains. The gender of the plug and socket
at the transceiver end was swapped on later models 
When we received our Paraset in September 2020, it was in an unknown state,
but we knew that the power supply unit (PSU) was broken. A first
investigation revealed that the rubber of the original mains cable
had become brittle
as a result of which the two mains wires were shorted.
We noticed that the two
mains filter capacitors had exploded and that
one of the secondary HT windings had a short circuit. This means that the
mains transformer was lost.
In addition, the
smoothing capacitor and the bleeding resistor
had both died as well, which means that not a single component
inside the PSU had survived.
To make matters worse, a previous owner had drilled four holes in the front
panel, to make the various voltages available on banana sockets.
Surprisingly, the device does not have a mains fuse, so it may easily
have been overloaded.
Although it is possible to have the transformer rewired, we decided to
replace it with a same-size modern alternative for safety reasons.
We also knew that the original transformer was under-dimensioned,
as wartime users frequently complained that it was always running hot,
and that in several cases they had to interrupt the transmission in
order to give it a chance to cool down.
After replacing the passive components, the new transformer was fitted
in the existing mounting holes and was wired to the rectifier socket,
the output connector and the voltage selector. In addition, a new
6X5 rectifier valve was installed.
It was decided to leave the non-original banana sockets in place, as otherwise
it would be very difficult to cover the four holes in the front panel. Although
these banana sockets were not present when the device was released, they are
left as a witness of an aftermarket modification.
The result is visible in the image on the right.
Although there is no fuse in the original design, it was decided to fit an
era-correct one inside the device – in series with the primary winding of
the transformer – for safety reasons and to protect the transformer should the
6X5 valve short out unexpectedly. As the four banana sockets would otherwise not
have a function, they were wired in parallel with the 4-pin Jones socket,
as was the case in the 'original' aftermarket modification.
The result is shown in the circuit diagram below:
Restored power supply unit
The paraset itself was first tested with two professional adjustable
power supply units: one set to 6.3V for the filaments, and one gradually
raised from 90V to 340V for the anodes of the valves.
Whilst doing this, we used an infrared camera to check if any parts
were internally overheating.
Once we were satisfied that this was not the case and that there
were no short circuits, it was time to conduct a first test.
Wires were connected to the
antenna and ground terminals,
a 3.518 MHz crystal was installed, the MODE-selector was set to TRANS,
and the morse key was held down.
After a bit of playing with the TANK and AREAL tuning controls, the
two indicator lamps lit up and the transmitter came to life. It
produced a strong and clear signal on the desired frequency.
It appeared to be easy to find the optimum setting,
which is just below maximum light. 1
Next, the headphones were installed and the MODE-selector was set
to RECEIVE, but no sound was heared. After wiggling the valves,
it became clear that the socket of V3 was worn out. The contacts
were fixed and noise was heared through the headphones, but no signal
Furthermore, the reaction potentiometer (R7) was stuck, as a result of
which the reaction point could not be adjusted. After oiling its axle,
the resistors and capacitors of the receiver circuit
were checked. It appeared that two resistors (R4, R9)
were way out of spec, and that all electrolytic capacitors (C13, C16,
C18 and C19) were gone.
The resistors were replaced by modern ceramic alternatives, covered
in old sleeves, whilst the electrolytic capacitors – with their prominent
blue jackets – were carefully disassembled and emptied, so they could
house a replacement.
Whilst carrying out the repairs, it was noticed that the coupling
capacitor (C14) between V2 and V3 had been replaced in the past.
As it looked way too new, it was replaced by a new part that was
made to look old. It was also noticed that there were some solder
problems on the taps of the receiver coil (L3). Apparantly, the
wire to the cathode of V2 had been broken in the past.
This was probably caused by frequent wiggling when installing
the valve (V2).
As the wire had been replaced by a modern one, and the solder joints on
the receiver coil (L3) looked messy, we decided to replace it with a
properly sleeved one, and rework the solder joints of the receiver coil.
After carefully checking the restored parts, the receiver was powered
up again and a 3.4 MHz signal was applied to the AERIAL input.
After turning both tuning knobs, and adjusting the REACTION control knob
as per instructions in the manual,
the signal came through loud and clear.
index on the linear tuning scale still
corresponds exactly with the
graph inside the case lid —
80 years after the device was manufactured and calibrated.
The restored Parsaset was then closed, and its operation was checked
in combination with the original PSU, of which the restoration
had meanwhile also been completed. It appears that transmitter
and receiver are very stable and easy to operate.
No wonder that the Paraset has become a popular repro subject.
This corresponds to the
instructions in the manual, where it is
suggested to adjust the TANK and AERIAL controls until the
TANK indicator burns at approx. 7/8th of its maximum strength
- Short circuit in brittle mains cable (PSU)
- One of the secondary HT windings of the mains transformer shorted out (PSU)
- Both mains filter capacitors blown (PSU)
- Smoothing capacitor gone (PSU)
- Bleeder resistor has become infinite (PSU)
- Rectifier valve (6X5) missing (PSU)
- Four extra holes in front panel (PSU)
- Interconnection cable stiff and too modern 1
- Both Howard & Jones plugs unstable
- Reaction potentiometer stuck
- Receiver very insensitive
The original braided cable had been replaced by a modern rubber cable
by a previous owner.
- Mains cable replaced with (secure) 3-wire brown braided cable
- Mains ground connected to chassis (for safety)
- Both mains filter capacitors (V2, C3) replaced
- Smoothing capacitor (C1) replaced (inside original casing)
- 200k bleader resistor (R1) replaced
- Transformer (TR1) replaced
- Era-correct fuse holder added
- 6X5 rectifier valve (V1) replaced
- Banana sockets rewired with era-correct wiring
- Interconnection cable replaced by 3-wire brown braided cable
- Both Jones connectors restored
- Valve socket (V3) repaired
- Reaction potentiometer (R7) repaired
- Wire between L3 and the cathode of V2 replaced
- C13 (2µF) replaced (inside original casing)
- C18 (8µF) and C19 (2µF) replaced (inside original casing)
- R9 (75k) replaced
- R4 (1M) replaced
Be careful when trying to use an original Paraset power supply unit,
as a lot it wrong with its design. First of all, there is no power switch
and no fuse whatsoever. This means that the transformer is activated and
the valve filaments are heated as soon as the device is plugged into the mains.
transformer is under-dimensioned, as a result of which it can overheat
when the transmitter is used for an extended period of time.
After 80+ years, all of the electronic parts are most definitely gone,
and the (rubber) wiring is likely to have become brittle over the years.
In addition, the 6X5 rectifier tube is notorious for shorting out to ground
– especially when driven at its limits –
as a result of which it might blow one of the HT windings (as was the case
in our device). The latter can be overcome by using a separate 6V winding
for the filament of the 6X5 
, but this was not avaiable on the original
Also note that the 240V setting of the voltage selector, connects to the
same tap on the transformer as the 225V setting. This is particularly
important, as the mains voltage in continental Europe has been raised
at the beginning of the century from
220V to 230V, and is in many cases even higher that this.
Mains voltages of 240V are no exception. As a result, the transformer
may saturate and eventually overheat and break down.
UserSIS (MI6), SOE
DeveloperSIS Section VIII (Whaddon Hall)
PurposeAgent communication (SIS, SOE), resistance
Dimensions222 x 142 x 110 mm
Weight2580 g 1
Including all three valves and one crystal.
ModulationAM R/T, CW
Frequency3 - 7.6 MHz
CircuitsRegenerative detector, AF stage
OutputHigh impedance headphones
AntennaLong wire (and ground wire)
HT+245V DC (derived from +360V), 10mA
Frequency3.3 - 7.6 MHz
Ranges(1) 3.3 - 4.5 MHz, (2) 4.5 - 7.6 MHz
Output4 - 5 W
Morse keyInternal only
Input110 - 240V AC (6 steps), 40 - 60Hz
CurrentLT: 950mA, HT: 10mA (RX), 40-50mA (TX)
Dimensions114 x 110 x 110 mm
Below is the pinout of the Howard & Jones 3-pin socket at the front panel
of the Paraset, when looking into the socket. Note that on later versions
of the Paraset, the female chassis part was swapped for a male chassis part,
for safety reasons. The pinout was kept the same though, and uses the same
pin numbering. Equivalent cable parts are also available from Hirose (HRS).
- HT +360V
- Ground (common)
- LT ~6.3V
The LT and HT voltages ae available on a Howard & Jones 4-pin female
socket at the front panel of the PSU. Below is the pinout when looking into
the socket. A short braided interconnection cable was used to connect the
Paraset to the PSU.
- HT +360V
- not connected
- LT ~6.3V
- Ground (common)
The 6V6 is a beam-tetrode in a metal enclosure, developed in the mid-1930s
by RCA for use in the audio stages of broadcast receivers.
They are frequently found in single-ended or push-pull amplifiers,
and even in today's vintage/retro valve-based amplifiers. Apart from the
use in audio amplifiers, the 6V6 can also be found in the oscillator and
PA stages of short-wave transmitters.
In the Paraset, the 6V6 is used in the single-valve transmitter,
as a combined oscillator/power amplifier (PA). In this configuration it produces a maximum power output
of 5 Watts.
➤ 6V6 datasheet
The 6SK7 is a remote-cutoff pentode in a metal enclosure,
developed for use as high-gain
radio frequency (RF) and intermediate frequency (IF) amplifiers in radio
receivers. Because of its cutoff characteristic, it can handle high
signal levels without cross modulation or distortion. It is also suitable for
receivers with automatic gain control (AGC).
In the Paraset, the 6SK7 is used in both stages of the receiver:
the regenerative detector (V2) and the audio frequency (AF) amplifier (V3).
➤ 6SK7 datasheet
6X5 is a full wave rectifier. It contains two diodes with a common – indirectly
heated – cathode. The valve is notorious for shorting out to ground and
destroying one of the windings of the transformer to which it is connected,
especially when driven to its limits. This can be avoided by using a separate
(floating) 6V supply for the filament of the 6X5 or by adding a fuse.
➤ 6X5 datasheet
- Cor Moerman, Mk. VII Paraset - THANKS !
Received September 2020.
- Louis Meulstee, Wireless for the Warrior, volume 4
ISBN 0952063-36-0, September 2004.
- Wikipedia, Paraset
Retrieved May 2021.
- Henk van Zwam, The Whaddon Mk-VII, a.k.a. 'The Paraset'
Visited 6 May 2021.
- Johnny Apell, The Whaddon Mk VII - Paraset Clandestine Radio
SM7UCZ. Visited 6 May 2021.
- David White, Personal correspondence
August 2009, May 2021.
- Bas Levering, Instructions for working a Paracette
Blogspot PE4BAS. 4 March 2021.
- Larry, The notorious 6X5 and kin
Aniques Radio Forum. Retrieved May 2021.
- A.S.M. van Schendel, Mijn werkzaamheden als chef-marconist van de OD en mijn belevenissen in de gevangenis
Organisation of the Internal Radio Service (BR) of the OD
and the radio links with the UK.
Post-war report, in Dutch language. Date unknown.
- Poem code 'Toen onze mop een mopje was'
Ton van Schendel. Date unknown.
Any links shown in red are currently unavailable.
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