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Secret Communications 2
12 and 19 November and 3 December 2016, and 14 January 2017

Following the success of the exhibition Secret Communications, back in the winter of 2013, Crypto Museum has once again teamed up with the Foundation for German Communication in Duivendrecht (near Amsterdam, Netherlands) for the exhibition Secret Communications 2. This exclusive exhibiton will be open to the general public the following Saturdays:

  • Saturday 12 November 2016
  • Saturday 19 November 2016
  • Saturday 3 December 2016
  • Saturday 14 January 2017
On these days, we will be open from 10:00 to 17:00 and admission is free. Furthermore, coffee, tea and sandwiches will be available free of charge. We will be showing an exciting collection of cipher machines and spy radio sets, some of which have never been on public display before. Check the overview below to see what we have selected for you. Large groups may apply for a visit outside the regular opening days and times. Contact Arthur Bauer to make arrangements.

 What to expect

Click here to download the leaflet

12 & 19 November & 3 December 2016 - Kloosterstraat 23-25 Duivendrecht - Netherlands

Cipher machines
Like in 2013, we will be showing an exciting collection of rare cipher machines, some of which have never been exhibited in a private collection before. How about the British Typex Mark 23 shown below? It was used during WWII by the British Army for messages at the highest level and has five coding wheels and two printers. Strangely, it is still considered classified in the UK today.

Typex cipher machine used during WWII by the Brish Army

Another exciting new cipher machine in our collection is NOREEN, a one-time tape device that was developed shortly after WWII as a solid-state alternative to the wartime ROCKEX. The machine is unbreakable as it uses a noise-generated key tape that is at least as long as the message itself. But unlike other machines in its class, it uses a very uncommon 6-level punched paper tape...

Unbreakable NOREEN cipher machine

And of course we will be showing the usual suspects, such as the famous German ENIGMA cipher machine and some of its rare family members. After all, what would a crypto exhibition be without them? The ENIGMA was used by the German Army during WWII and was thought to be unbreakable. Yet it was broken at large scale by the Allied Codebreakers of Bletchley Park.

Click to see more

Spy radio sets
Apart from cipher machines, we will be showing a nice collection of spy radio sets and their accessories. On this occasion will be focussing on the history of the secret Dutch Stay-Behind Organisation O&I and the equipment they used during the 46 years of their existence, from the very first three-piece valve-based set, to the last fully digital automatic one with built-in crypto.

The Philips/NSF ZO-47 spy radio set, developed in 1947

Some of these items have been kindly given on loan by other museums, such as the first and only Dutch spy radio set ZO-47 shown above. It is probably the only surviving example of this radio set. Another example is the FFS-7 below, which will be shown in its original cache container. The latter has kindly been given on loan by the dutch ham radio museum Jan Corver.

The FSS-7 (SP-15) spy radio set in its original container

Apart from highlights of the former O&I network, we will also be showing a selection of rare spy radio sets from former Eastern Block countries like Czechoslovakia, Yugoslavia 1 and Hungary. Some of these have only been recovered recently and have never been on public display before.

Czechoslivakian SIRIUS spy radio set, used during the Cold War

  1. Stricktly speaking, Yugoslavia was not an Eastern Block country during the Cold War, as it was not part of the Warsaw Pact. Although it was a communist country, it was neutral and was never part of the USSR either.

Things to expect
Last updated 8 November 2016

Below is a non-exhaustive overview of the items we will be showing and demonstrating in this exhibition. Further information on each item is available by clicking the corresponding thumbnail image below. This list will be updated regularly so please visit this page again soon.

Enigma I
Naval Enigma M4 (used by the U-Boats or the German Kriegsmarine)
The main Commercial Enigma machine on which all later models were based
Zählwerk Enigma A28, the predecessor of the Enigma G
Special version of Enigma K for the Swiss Army
Schreibmax printer attachement
Enigma Uhr (also known as UhrBox)
Umkehrwalze D
Fialka M-125 cipher machines
British WWI Typex cipher machine
British one-time tape cipher machine compatible with Rockex
SIGABA cipher machine, used by the US during WWII
Siemens Schlüsselgerät D
The first cipher machine used on the Washington-Moscow hotline
The Siemens M-190 mixer machine
Portable stand-alone message encryptor
Reichert 5010
Highly secure encryptor for SWIFT payments
The famous Type 3 Mark II, also known as the B2
The UK Type A Mk. III (A3)
ZO-47 spy radio set, developed by Philips/NSF in 1947
RT-3 spy radio set, also known as RS-1 and AN/GRC109
Special version of the Amerian RS-6 spy radio set
FSS-7 (SP-15) spy radio set
DZO-81 spy radio set (Racal PRM-4150)
AZO-90 spy radio set (Telefunken FS-5000)
Hungarian AK-20 spy radio set
Czechoslovakian VHF or UHF bug receiver
Yugoslav RTP8-SSB and RTP8-SSB/3
PLUTO spy radio set (1958)
SIRIUS spy radio set (1962)
50W transmitter used in Congo
200W radio station used in Congo and Kurdistan (North Iraque)
Abwehr spy radio set SE-109/3
Abwehr spy radio set SE-98/3
Post-war German spy radio set 12-WG
Post-war German spy radio set ESK-52
Electronic Dead letterbox
British WWII scrambler phone used by Churchill
KY-3 wideband secure voice system with KYX-9 desk set used by Kennedy
Secure Telehone Unit STU-I (KY-70)
Secure Telehone Unit (ITT, Northern Telecom) used by Reagan
Secure Telehone Unit (Motorola, AT&T, RCA, etc.) used by Bush
Secure Terminal Equipment (STE) used by Obama
KY-68 Digital Secure Telephone
Philips Spendex-40 secure telephone for voice, fax and computer
Philips Spendex-50, military secure crypto phone (a.k.a. DBT)
Philips PNVX secure crypto telephone
More items will be added over the next few months. Check this page regularly to see when new items have been added.
Super Enigma
People interested in the history and function of the Enigma Machine will no doubt have come across the 'super enigma' built by Tatjana van Vark in 2003. Under the name Cryptograph, Tatjana has provided a beautiful example of how art and technology can go hand in hand. If you want to see this machine 'in the flesh', now is your chance. For the first time, Tatjana will be demonstrating the Cryptograph on the following opening days of our exhibition:

  • Saturday 12 November 2016
  • Saturday 3 December 2016

 See more of Tatjana's work (off-site)

Cryptograph by Tatjana van Vark. Click for more photographs and details.

Click to see more

The exhibition is located at the premises of the Foundation for German Technology, the private museum of Dutch collector Arthur Bauer and his wife Karin, which is located in Duivendrecht, near Amsterdam (Netherlands). Click the map above for Google directions. The address is:

Kloosterstraat 23-25
1115 BJ Duivendrecht

 Find the museum on Google maps

 Arthur Bauer's museum
 Shadow server (in case the above link doesn't work)

Important note: Traffic diversion
Please note that due to roadworks around the museum in Duivendrecht, between 7 and 27 November 2016, you will not be able to use the directions given by your navigation system. As the Randweg will be closed during this time, you will have to take a detour through Duivendrecht.

 Click here for additional instructions

Saturday 12 November 2016
Saturday 12 November 2016 was the first opening day of Secret Communications 2. When the doors opened at 10:00, some people were already cueing up at the entrance. We had visitors from France, Denmark, the USA, the UK, Belgium, Germany and, of course the Netherlands. Below are a few photographs of this day that were made by our German friend Karsten Hansky. THANKS!

Global view of the first exhibition room

As usual everyone gathers around the Enigma machines. In the foreground a British Typex.

Paul Reuvers and Detlev Vreisleben discussing a German spy radio set

Arthur Bauer being interviewed by the VRZA

Tatjana van Vark demonstrating the Cryptograph

Wednesday 16 November 2016
For large groups it is possible to arrange for a visit outside regular opening hours. Wednesday 16 November 2016 was such a day that was scheduled especially for a group of 30+ students of Amsterdam University. And they didn't come empty handed as the photograph below illustrates...

Entirely in style: a large cake with the image of the Lorenz SZ-42 (still our our wish list)

Saturday 3 December 2016
The last opening day of 2016, on 3 December, was an great success. Some people were already queing up when the doors opened at 10 o'clock. In total, we counted just under 200 visitors this day, which makes it the most successful one so far. Luckily, Jan and Marjan Rijnders were present to help us out. Thanks! Below is a nice selection of photographs that were made by Gerard Vos.

The doors have just opened but we already have a full house

Fascinated by the Enigma machines

How often can you touch a disassembled Typex machine?

Paul discussing the British Typex with a visitor

Local visitors fascinated by the Typex

French delegation inspecting a Russian Fialka...

The tireless Tatjana van Vark demonstrates here Cryptograph. It is always crowded when she speaks.

Some visitors are really puzzled...

Marc in a vivid discussion with Elector's international editor Jan Buiting

Paul answering questions from the public

And we even had visitors from Italy...

Arthur explaining Nachtfee to Swiss visitor Gerhard Sulger Bühl

Some visitors seem to be pleased with Marc's explanation

Further information
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