Maintenance or Armory Storage personnel would remove the scopes to do corrective maintenance on the scopes or rifles or better protect the scopes in storage. Painting the rifle's serial number was one way they ensured the right scope and mount went back on the right rifle. They also used electric pencil engravers on some guns when they were available.
Surely those numbers stamped on the tube were there BEFORE the scope was assembled.
I had an M84 and the only number on it was the nameplate attached to the turret block. I don't recall any stamped numbers on the tube. Mine apparently wasn't committed to a relationship with only one rifle.
Looks to be a Danish issue scope. The "Nr" is the give away. A number of scoped Garands were supplied to Denmark after the war. Stamped number on the tube is more than likely the part drawing number. DI5
The maximum effective range of any weapon is where you can effectively engage the target.
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