Chistopol Clock and Watch Factory "Wostok". This is how to open it up for repairs. Ship's clock 5-CHM. 13 jewels, 8 day movement, aluminum alloy case, splash proof case. No need to take apart movement because it is new and still has oil on the pivots.
This video performed by an amateur. Do not attempt at home. No submarine clocks were harmed in the making of this video. For entertainment only.

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