So...
With Russian Tulas 1954 and before...a lot of people list stuff with "matching serial numbers". That means nothing. OK, so it's not force matched (ie. ######ed over). Still doesn't mean anything...
Here are some definite signs of refurb for Tulas...
1. left side of stock - what does it look like? If it has the Tula star, year and matching number without ######, that is a good sign. Some Russian rifles have JUST the serial number etched on...those are refurbs
2. left side of gun - where the crossbolt is - are there cartouches there (little symbols)? If so that is a good sign
3. Do you have anything that is a rectangle with a slash through it or a diamond with a slash through it. Those are all refurb signs
4. Is the stock the reddish arctic birch? If so, check #1.
5. Is the bayonet black? If so it's a refurb
There are also other stuff like obvious BBQ paint used, peened screw/pin on the bayonet and other things like the gas tube handguard having slightly different colouration...or the fit is such that the lever is extremely hard to operate...
Some non related stuff - some people like the pinned follower rather than the welded block on the mag...which is not aesthetically pleasing - and may require BBQ paint to cover.