Help needed for soviet watch

[matteti]

Hello,
I am interested to acquire a soviet watch (pre 1950s) for display in my mini soviet museum I hope to be able to have one day. However, when doing some research on Internet, I discovered that as with medals and orders, there are many fake and fakers and there are many modern re-issues as well.

I was wondering if there was a member of the forum who had good knowledge about soviet mechanical watches to help me a bit by giving advices and possibly recommending a reliable source.

By example, this specimen currently on a russian auction site.

To me, this is clearly a recently made re-issue.
The original was 15 jewel, this one is 17. Also, we don't see engraved date and quarter of production. There is a mint mark on the big wheel, where original photos I have seen don't have and the cap on reverse said it has anti-shock protection.. I believe the original just have a plain steel cap on back without any inscription.