Matching two-digit numbers on bolt and bolt carrier, only on early Russian SKS

[Bob_The_Student]

Damn it I forgot to check mine. I'll try today.

[Shoot The Refurbs]

Matching #2's on my bolt and carrier of the tula no date refurb.
checked the 53' izzy refurb as well and it does not have the side stamped numbers present.

And I forgot to put my picture 


Same size, font, and even angle. I tend to agree with the idea of it being something done at certain places, perhaps refurb sites, to keep the bolt and carrier together.
But interesting nonetheless.

[Bob_The_Student]

'50 refurb shows only a "5" on carrier and I don't see anything else that matches as far as a number or what maybe a number










'51 Refurb has "1" on both carrier and bolt...






'51 Queen has "1" on both but they are not stamped well but I'm confident there are parts of a "1" on both carrier and bolt

[Boris Badinov]

Handful of stamps on my 1950, type1 bolt and carrier, but No number stamps.




No ep on the inside of the extractor claw either

[jaroslav]

Matching 20 on the bolt & receiver on 1949.

[100Acre]

I just put them away but, there’s a 2 on my early 1950

[jstin2]

Until I read this post, I did not think anything of these numbers. But when I bought my early 50 with spike (ИМ 3) in Feb. and noticed it's number, I grew more curious. It looks like a Q. Until I can post some pictures from mine, here are some pictures from a 49 to a 51 from another collector.

https://ibb.co/album/qCPshB

[jstin2]

I took some pictures of my early 50. I do not have macro lens but got some pictures anyway.
https://ibb.co/album/9HYVWB