Dumb question for Watchmakers on here

I was looking at my pocket watch (cuz why not) and I noticed a number stamped under the balance wheel. I know often that will be the movement calibre but as you can see here in this example that clearly doesn't say 2609. What is this number for? Movement is a Raketa 2609.HA

Reply
·
Image

Photo here because for some reason it wouldn't upload. This is of the same movement as mine but it isn't my watch

·

I'm guessing serial number but that's a guess.

·

I have been all over the place looking for the answer. I believe that it is the signature of the factory. I know that Vostok put their symbol under the balance.

·

I second @OscarKlosoff's guess.  Looks like a serial number for the mainplate to me.

·
PoorMansRolex

I'm guessing serial number but that's a guess.

Thank you

·
Aurelian

I have been all over the place looking for the answer. I believe that it is the signature of the factory. I know that Vostok put their symbol under the balance.

Thank you