Post-War TTs have fine line rear slide serrations, while earlier models have different ones as pictured (I like 'em better).
Also if you want a Tula -manufactured pistol for your collection, those stopped in the middle of WWII, so no chance of one in a later batch.
All are refurbished and might have mix-n-match parts and some up-graded components. But some at end of production were put in storage pretty well un-used, so you might get close to as-issued in a later batch.
Not TradeEx's fault, but the ugly markings kill any interest for me on these. Guess I won't reach three dozen Tokarevs yet!