Otto:
Any history on the stalker, GI bring back, etc.? I don't see a repair or reproof stamp on the tube unless it is on the side. Any sign of repair to the receiver? I wonder if there was some frame filing on the sideframe reinforcement or if some metal was removed from the receiver in early 1945? The answer(s) may lie with the Suhl proofhouse records if any exist for early 1945.

Kind Regards,

Raimey
rse