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Siemens T-68 → ← T-36
T-37 is the successor to the T-36. It
was used in the years before, during and after
World War II (WWII)
on many telegraphy networks in Europe, including the
public telex networks of Germany, Belgium, France, Austria and The Netherlands.
A Dutch variant is shown in the image on the right.
During WWII,
the machine was used extensively by the German Army for
communication with all parts of the war theatre, mainly over fixed land-lines,
but occasionally also over the air (radio).
A variant of the machine with built-in
One-Time Tape encryption,
was known as the T-37/ICA.
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In addition, the T-37 was sometimes used in combination with external OTT
cipher equipment, such as the
Siemens Schlüsselgerät D.
In that case, the T-37 was used as an input/output terminal.
A strip-printing version of the T-37 – known as the T-34 –
had been introduced in 1930.
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- T-37
This is the standard version of the T-37 teletypewriter.
- T-37 ICA
This is a special version that has been coverted for use as a One-Time
Tape cipher machine. It features two large lamps on the front cover
(a green one and a red one) and has a connection for an external tape reader.
- T-34
This is the strip-printing version of the T-37, introduced in 1931.
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The T-37 was also available with integrated
One-Time Tape (OTT) cipher machine,
or Mixer.
It is known as T-37 ICA and can be recognised by two large
lamps on its cover: a green one and a red one. Furthermore, it has a connection
for an external paper tape reader, of which the characters are
binary xor-ed with the letters from the plaintext.
It is the automated
form of the On-Time Pad (OTP) cipher.
When correctly applied and used with a truly random tape,
it is unbreakable [2].
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The T-37 is known to have been in service in the following countries:
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- Austria
- Belgium
- Denmark
- Germany
- Netherlands
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- Afbeeldingen Verreschrijvers Type 37 en Type 34 en Ponsontvangers
Detailed pictures and drawings of T-37 and T-34 (Dutch).
PTT, 1951. 3rd print.
- Tgf 1011a, montage-, instel- en onderhoudsvoorschrift T typ 37 g t/m i
Installation, alignment and maintenance manual (Dutch).
PTT, November 1956, Issue 1.
- Tfg 1011b, Afbeeldingen
Pictures, belonging to Tgf 1011a (Dutch).
PTT, November 1956, Issue 1. 1
- Tgf 1024a, Beschrijving bladschrijver T typ 37 a t/m i
Description of T-37a thru i teleprinters (Dutch).
PTT, August 1959. Issue 2. CM303981.
- Tgf 1024b, Afbeeldingen
Pictures, belonging to Tgf 1024a. (Dutch).
PTT, August 1959. Issue 2. CM303981.
- De Verreschrijvers T-37/LP, T-68/LP
Description and operating instructions for the Siemens T-37 and T-68 (Dutch).
Belgian Army. March 1967.
- Afregelvoorschrift voor den Verreschrijver en den Reperforator Fabr. S. & H.
TLX 23. Alignment procedure for the Siemens T-37 (Dutch). A5 size.
CM303970. To be used with item (F) CM303971.
- Afbeeldingen van den Verreschrijver en den Reperforator Fabr. S. & H.
TLX 70. Images of the Siemens T-37 (Dutch). A4 size.
CM303971. To be used with item (F) CM303970.
- Blattschreiber T typ 37 h mit Schlüsselzusatz - Manual (German)
Fs Bs 2179/80. Si9emens & Halske, 23 May 1956. 2
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Document kindly provioded by Gert Stam [1].
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Document from MfS
Abt XI 385 archive, obtained from BStU [4]
and kindly provided by Jörg Drobick [5].
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Full name: Bundesbeauftragte für die Unterlagen des Staatssicherheitsdienstes
der ehemaligen Deutschen Demokratischen Republik
(DDR) —
Federal Commissioner for the Records of the
State Security Service
of the former German Democratic Republic
(GDR) —
officially abbreviated BStU.
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© Crypto Museum. Created: Monday 15 January 2018. Last changed: Sunday, 08 September 2024 - 08:42 CET.
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