I purchased this watch a while back as broken, the watch is a Russian divers watch, i quite enjoy working on these watches due to there good build quality, i would class these watches as great workhorses and good timekeepers.
Here are some images of the dis-assembly.
The reason the watch wasn’t working was due to one of the wheels being bent and therefore not catching the teeth of its interlocking wheels, this was a simple fix with a staking set.
The pictures below show some steps of the reassembly including the lubrication of the replaced case gasket.
Some pictures after the watch was timed and cleaned up for my personal collection.