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M-125-3xx Hungarian variant
Hungarian variant of the M-125-3 Fialka

As a country of the Warsaw Pact, Hungaria also used a variant of the M-125-3 that was adapted for the local language (Hungarian). As no surviving Hungarian Fialka machines have been found so far, we do not know the keyboard layout of these machines. During one of our trips through Europe however, we discovered a complete Hungarian Fialka wheel set, which is presented here.
 
Aluminium container and 5K wheels

 
Hungarian wheel wiring   5K
In July 2014, during one of our trips through Europe, we discovered a complete set of adjustable Hungarian Fialka wheels which a 5K prefix. This set has clearly been used, but is in extremely good condition. More importantly, the set is complete and all wheels have matching serial numbers. The wiring of the wheels is given below, but can also be downloaded in XML format.


In this table, each row represents a wheel, whilst each column represents a single contact on a wheel. At the top of the table are the entry contacts which are at the right side of the wheel (i.e. the side with the spring-loaded contacts). The table itself shows the output contacts (i.e. the left side of the wheel). The positions of the Advance Blocking Pins are marked in red. At the far right is the total number of Advance Blocking Pins for each wheel.

 More wiring details
 
Aluminium container with 5K wheels (open) Wheels partly removed from the container Aluminium container and 5K wheels Close-up of a 5K wheel that has been removed from the spindle Right side of a 5K wheel (K) The wiring core removed from a 5K wheel The wiring core removed from a 5K wheel Close-up of a 5K wiring core (wheel K, side 2)

 
Wheel stepping   5K
When testing a Hungarian Fialka, either as a real machine or as a simulation, the following table might be useful when checking the wheel stepping mechanism. Put all wheels in their default setting (i.e. ring set to 'A', matching core with side '1' up with the mark set to 'A') and place them in the machine in the default order: АБВГДЕЖЗИК. Now lower the ruler and set the wheels to AAAAAAAAAA (just above the ruler). Next, type 30 random characters on the keyboard and compare the position of the wheels after each step with the following table [2]:
 
Wheel А Б В Г Д Е Ж З И К
Step 1 2 3 4 5 6 7 8 9 10
0 А А А А А А А А А А
1 А Й А Й А А Б А Б А
2 А Я А Я А Й Б Й В Й
3 А Ю А Я А Й Б Й Г Й
4 А Ь А Ю А Й Б Й Д Й
5 А Ы А Ю А Й Б Й Е Й
6 А Щ А Ь А Я В Й Ж Й
7 А Ш А Ы Б Ю Г Я З Й
8 А Ч А Ы Б Ю Г Я И Й
9 А Ц А Щ Б Ь Г Ю К Й
10 А Х А Ш Б Ы Г Ю Л Й
11 Б Ф Б Ш В Ы Д Ю М Й
12 Б У Б Ч В Ы Д Ю Н Й
13 Б Т Б Ч В Ы Д Ю О Й
14 Б С Б Ц В Щ Е Ь П Я
15 Б Р Б Ц Г Щ Ж Ь Р Я
16 Б П Б Х Г Ш Ж Ы С Я
17 Б О Б Ф Г Ч Ж Щ Т Я
18 В Н В У Д Ц З Щ У Я
19 В М Г Т Е Х И Ш Ф Ю
20 В Л Г С Е Ф И Ч Х Ю

 
References
  1. Paul Reuvers and Marc Simons, The Fialka M-125 Reference Manual
    Copyright 2005-2009. Version 2.0, June 2009. ISBN 978-90-79991-01-3.

  2. Paul Reuvers and Marc Simons, Hungarian Fialka 5K Cipher Wheels
    Crypto Museum Archive #CM301956. July 2014

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Crypto Museum. Created: Sunday 06 July 2014. Last changed: Monday, 12 October 2015 - 14:58 CET.
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