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Service, Repair & Adjustment Techniques (Not Timing or Regulation)

Discussing subjects relating to servicing, making adjustments and repairs to watch parts and movements and fitting balance staffs. This section is not for timing or regulation discussion. To discuss Regulation or Timing please go here.


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  1. AS 2066 Reassembly

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  2. Eta 2846-2 not running 1 2 3 4 5

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  4. Felsa 4033 identify part

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  5. Hairspring

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    • Have you noticed any problems with using no.1 all of the time ?  Could it be like using a pair of needle nose pliers to take all the parts of a car engine ?
    • The Chaika 1601A bridge styles look more like something from an earlier time. It is also finished relatively well for the 1980s, as a lot of manufacturers by then had started a race to the bottom in terms of finishing and materials as a result of the quartz crisis. If you compare it with a comparable Swiss movement from the same period, you will find they have much less elaborate bridges, and other cost cutting measures. Straight cut bridges with no bevel on the edges are much cheaper and simpler to produce than the curved bridges of the Chaika 1601A. They even went to the trouble of stamping a serial number on the movement. A practice which only the higher end Swiss manufacturers were bothering with by this point. The Chaika 1601A does have a relatively cheap balance though. The 'timing screws' in the balance are for decoration only. Having said all that, the USSR caliber designs were fairly conservative, and produced for relatively long periods. This was partly as a result of the command economy, which tended to lead to relatively little innovation in design, and partly because they weren't chasing after the fickle flights of fashion that arguably drove some of the changes from other manufacturers. Some of the USSR designs were licensed or even "borrowed" from Swiss and French designs.   For example I have a Sekonda pocket watch (which may be the next one on the bench for a clean and service). It has a Chelyabinsk Watch Factory "Molnija" 3602 caliber in it, which was based on a Cortébert movement used in Swiss watches from around 1940. Here is one of the examples from Ranfft. You can see that it is similar to the Chailka with curved bridges. They even had Breguet over coil hairsprings and "Geneva" striping. Some had shock protection, some did not.   The Sekonda is in its original 1980s plastic presentation box, complete with "manufacturers guarantee" (although Sekonda obviously didn't manufacture it). This same Molnija  movement was produced in the Chelyabinsk Watch Factory with little change, except notably in the level of finishing, from around 1947 until the early 2000s when production ceased. For comparison, here is a Swiss ST96 from around the same period as the Chaika and the Molnija. . Smaller jewels, flat and unrefined finishing, and all in all, a little bit lacklustre. .. and a Rolex 600 from around 1922   The Chaika, despite being from the 1980s, to my eye at least, looks a little closer to the Rolex than the ST96  
    • Elaborate on this statement. What sorts of things define calibers from different decades? The only thing I can think of short of the pocket to wrist watch shift around WWI and quartz is shock settings starting... late-40s, early-50s?
    • I'm not sure who "we" is as I'm not a part of how "we" do it. Most of "us" develop their own method(s). Please re-read what has been said;  
    • Nice one Andy- a very ‘blingy’ 404 with all those jewels…
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