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Translated in google from this russian forum: http://forum.watch.ru/showthread.php?t=16210
"Additional notation on the caliber of hours, of Soviet manufacture.
The basis of ciphers to an hour caliber mechanism and its distinctive design features.
If the two mechanisms have the same distinctive features, but differ on a design, then a cipher mechanism, which is developed later in time, the right hand side is added to the letter H, for example, "Raketa" in 2609 and 2609H. When the new arrangements with the same hallmarks of a cipher on the right side through the points added 1H, 2H, for example, "Raketa" 2603H, 2603.1H, etc.
Attribution cipher modernized arrangements as follows:
a) If the reduced modernization does not entail a change in the cost of production hours (modification of the construction of separate parts, etc.), the mechanism is assigned to code the main mechanism to which the right hand side is added, one of the following capital letters of the Russian alphabet: A, B, C, D, E and F.
For example, a mechanism should have the code "Raketa" 2609. As a result of modernization has changed design dogs and dog spring. Code mechanism after upgrade - "Raketa" 2609A;
b) If, after the upgrade mechanism will differ from the basic design of the functional number of stones, in which case its code will consist of the basic design of the cipher, to which the right through the point of adding the letter K and the numeral indicating the number of functional stone, different from the basic design.
For example, the code of the basic design - "Raketa" 2609. Code mechanism after upgrade - "Raketa" 2609.K5;
c) If, after the upgrade changes the accuracy of the mechanism, mechanism is assigned to code the basic design, to which the right through the point is added:
P - Improved accuracy,
1 - first class,
2 - second class.
For example, a mechanism to upgrade a second-class and had the code "Raketa" 2609, after modernization, he became the first class, its code - "Raketa" 2609.1;
d) If a modernized mechanism differs from the basic design of many functional and accuracy of the stones, then it is assigned a code of basic design to which the right through the point of adding a sign of the accuracy of the mechanism, the letter K and the numeral indicating the number of functional stone, different from the basic design.
For example, the code of the basic design - "Raketa" 2609, cipher mechanism after upgrade - "Raketa" 2609.1K5;
e) If the upgrade is a mechanism with the structural characteristics different from the basic design, then this mechanism is assigned a new code.
For example, to upgrade machinery with code 2600. In the process of modernization created a mechanism with side second arrow. Code of the new mechanism will be 2602. "
Article by Andrew Krukovich !
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