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T send 77
Double tape reader - this page is a stub

T.send.77, sometimes abbreviated to T-77, was a double 5-level reader for punched paper tape, developed in the early 1950s by Siemens & Halske in Germany. The device was suitable for a wide range of applications but was typically used as part of a One-Time Tape (OTT) cipher machine.

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Siemens T-send-77b
Siemens T-send-77b
Two tape readers with feeds
Souble tape reader
Double tape reader
Open tape reader
Multi-way connector
ID plates
A
×
A
1 / 8
Siemens T-send-77b
A
2 / 8
Siemens T-send-77b
A
3 / 8
Two tape readers with feeds
A
4 / 8
Souble tape reader
A
5 / 8
Double tape reader
A
6 / 8
Open tape reader
A
7 / 8
Multi-way connector
A
8 / 8
ID plates
❮ ❯

Cipher machines with T-send-77
Philips Ecolex I One-Time Tape cipher machine
Philips Ecolex-II One-Time Tape cipher machine
Siemens Schlüsselgerät D - One-Time Tape cipher machine
D
Specifications
  • Device
    Double punched paper tape reader
  • Purpose
    One-Time Tape cipher machines, reading two tapes simultaneously
  • Model
    T-send-77
  • Manufacturer
    Siemens
  • Year
    1952 ~
  • Standard
    5-bit
  • Dimensions
    ?
  • Weight
    ?
Further information
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© Crypto Museum. Created: Wednesday 11 September 2019. Last changed: Thursday, 04 September 2025 - 09:03 CET.
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