I done see an sa stamp and the rear sight has not been finned. Buttplate and flootplate match.
The bolt knob definitely looks Finnish though.
If it were mine, I would remove the buttplate to see if a 914r stamp is present in the base of the stock.
I'd also look for Izhevsk imperial proofs on the bands
So basically I'm now leaning toward a Finn capture that never went through a repair facility, which would be rare, and that got a replacement bolt very late in its service life. Finland didn't mark bolt knobs until around 1941.



























