Originally Posted by
stoggie
From my research, original pre WWII ones had a walnut stock, milled front sight hood and band, and were blued. The front sight hoods were not completely round, but more of a U shape similar to a P14. Post WWII Mle 1936's had stamped front sight hood and band, beech stocks, and were park'd. The front sight hood on these was completely round similar to a 91/30.
The best way to tell is the serial number, I THINK anything before J was Pre WWII, and H and up is post WWII, but please look into the serial numbers yourself.
Some Pre WWII specimens have Nazi proofs and command a premium.