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The Hagelin Cryptographers C-52 and CX-52
Bart Wessel · 24 February 2021

This paper (in English language) contains detailed technical descriptions and observations of the Hagelin C-52 and CX-52 cipher machines, of which many types, models, versions, variants and configurations exist. Below is an overview of the documents that are cited in the paper.

While the C-52 and CX-52 devices enter the open market and are exhibited in museums, it is hard to the untrained eye to tell the differences. There is a lot of confusion, and half-truths muddle the waters even further. It turns out that there is only a limited number of standard configurations of the C-52 and CX-52 machines.

These 'models' are described in detail, to enable the reader to identify machines he/she comes across. All the configurable components are described, to aid in the understanding of their differences and of the way the devices work.

 Download the paper


Consulted documents from the Crypto Museum archive
  1. The Hagelin Cryptographer, Type CX-52
    User Manual in English, French and German. 36 pages.
    D-035. Crypto AG, 1 January 1962.

  2. The Hagelin Cryptographer, Type CX-52 (photographs)
    Photographs belonging to the above manual [A]. 4 pages.
    Crypto AG. 16 January 1951.

  3. Instructions for the tape controlled cryptographer CX/RT
    User Manual for the CX-52 with random tape (RT) (English). 7 pages.
    No. 3165-a. Crypto AG (OST/iz), June 1968.

  4. Spare parts catalogue CX-52 (No 21101 etc)
    Spare parts list with instructions in English, French and German. 35 pages.
    L-061 (S/N 61851). Crypto AG. 1 January 1962.

  5. RT/CX One Time Tape auxiliary device
    CX-52/RT sales brochure (English). 3 pages.
    No. 3093 A. Crypto AG (Sn/hf), December 1958.

  6. Appareillage pour Chiffrement à Bandes Perforées
    Instructions for CX-52/RT (RT/CX), B-621 and PEB-61 (French).
    No. 2268. Crypto AG, Oskar Sturzinger. February 1969. 5 pages.

  7. Die Klaviatur B-621 (B-62)
    B-621 (B-62) keyboard attachment for CX-52 (German). 14 pages (with schematics).
    No. 1188a. Crypto AG, Oskar Sturzinger. June 1968.

  8. CX-52 Condensed Instructions
    No. 3035b. Crypto AG, BH. November 1957.

  9. Description of Cryptographers 'Hagelin' Type CX-52
    No. 3027. Crypto AG, Oskar Stürzinger, August 1956.

  10. CX-52 Service Instructions and Maintenance for Ciphering Machines Type CX-52
    No. 3099. Crypto AG, BH, January 1959.

  11. Spare parts catalogue for Hagelin Ciphering Machine Type CX-52
    No. L-013. Crypto AG, May 1956.

  12. Cryptographer type CX-52 - Specification
    No. I-3006c. Crypto AG, Oskar Stürzinger, November 1957.

  13. Service Instructions for keyboard unit B-52
    No. E-3121a. Crypto AG, Oskar Stürzinger, 12 November 1956 — July 1961.

  14. Ersatzteilkatalog (B-52) (spare parts catalogue)
    No. L-027. Crypto AG, 10 October 1957.

  15. Keyboard attachment unit type B-52
    No. 3052a. Crypto AG, Sn, January 1958.

  16. C-52 Trouble Shooting
    No. 3225a. Crypto AG, date unknown.

  17. Usage of Hagelin cryptographer CX-52
    No. <unknown>. 25 November 1964.

  18. Description Technique des Cryptographes Type CX-52
    No. 2027. Crypto AG (BH.Sn), February 1955.

  19. Bedienungsanweisung für das Gerät 'CR-2' (CX-52/RT)
    ZB6, BACR68, S/N 533. Bundeswehr (Germany), 1968.

  20. L'emploi de Bandes Aléatoires ... des Machines à Chiffrer C4 et CX-52
    No. 2084-a. Crypto AG (BH/iz), February 1969.(in French langage).
Consulted documents from other sources
  1. Binder with brochures 1
    No. 3337. Crypto AG, January 1962 (6 pages).
    Pocket Cryptographer Type CD-57
    Manually Operated Cipher Machine C-52
    The Keyboard Unit Type B-621 (B-62)
    The Tape Translator PEB-61

  2. The 'Hagelin' Cryptographer, Type CX-52. Instructions for Operation 1
    No. 3035. Crypto AG, May 1955. 16 pages.

  3. The 'Hagelin' Cryptographer. Type C-52. Instructions for Operation 2
    D-036. Crypto AG, 6 July 1960. 40 pages.

  4. Operating Instructions (C-52) 2
    No. D-3036 (3B036a). Crypto AG, 6 July 1960. 18 pages.

  5. Teile-Katalog, C-52 (No. 20501 etc.), No. 063697 2
    L-063. Crypto AG, date unknown. 46 pages.

  6. Service and maintenance instructions for Ciphering Machine Type C-52 2
    No. 3108b. Crypto AG, June 1968. 10 pages.

  7. The 'Hagelin Cryptographer', Type CX-52 - Instructions for Operation 2
    No. B-3131. Crypto AG, 1 January 1961. 40 pages.

  8. Instructions pour Appareils CX/RT 2
    A-2165. Crypto AG, August 1963. 7 pages.

  9. The 'Hagelin Cryptographer' Type CX-52-M. Instructions for Operation 3
    3175. Crypto AG, date unknown. 14 pages.
     Includes Note No. 354 - CX-52 A

  10. Erste Pannenhilfe für das Gerät C-52 2
    First aid for the device C-52 (in German language).
    Nr. 1225. Crypto AG, March 1969. 7 pages.

  11. Pricelist for crptographer CX-52 4
    No. 3803. Crypto AG, 1 January 1955. 1 page.

  12. Usage of Hagelin cryptographer CX-52 2
    No. V-7000e. Crypto AG, October 1962. 27 pages.

  13. Effect of computers on the security of Hagelin cryptographer C-52 1
    No. R-7002e. Crypto AG, October 1962. 7 pages.

  14. The Hagelin Cryptographers 1
    AB Cryptoteknik, 25 March 1948. 4 pages.

  15. Hagelin Crypto C-52 2
    Cryto AG, date unknown. 1 page.

  16. CX-RT Zeichnung 2
    E-755. Crypto AG, date unknown. 5 pages.
  1. Courtesy National Cryptologic Museum (NCM) - Louis Kruh Collection. June 2019.
  2. Document kindly provided by Gerhard Sulger-Buel. April 2020.
  3. Document kindly provided by Marc Sachs. 1 September 2019.
  4. Document obtained from the National Security Agency (NSA).

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Crypto Museum. Created: Thursday 11 March 2021. Last changed: Friday, 30 April 2021 - 18:36 CET.
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