Differences between Vostok 24XX parts: The Mainspring Barrel I’ve seen two types of Vostok 24xx mainspring barrels, and although similar they are not compatible. I learned this the hard way. As I had just finished servicing the above “Wostok Made in USSR” (I believe called “Sun Rise”), I tried to wind it fully, but half way through the click slipped and created a "chilling sound" in the train. Fortunately the watch survived (well, it’s Russian so I’m not too surprised ;)). The
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