[lornedavis]

"Bottom metal", magazine trigger guard actually, is from a standard length action. I am not familar with the 1934B but it must have had a medium length like the FN 1924's? From looks of butt plate, stock came off a FN rifle of the post war period. I doubt you will find a TG with German proofs in a med. action, may be wrong on that.
Does the reciever fit in the wood? Does TG fit the reciever?

 

[lornedavis]

This picture is of an intermediate action. The Gew 98 which is a standard or long action has the locking or "capture" screws on the opposite side of the trigger guard screws.

I used to think this also, until someone on this forum corrected me. Check your 1930 Venzualian FN Mauser, lock screw behind and standard bolt will go and lock. It seems to be something FN did.