Thanks for your help. I have not taken the scope off the top of the receiver yet. I'll need someone's help to do that as I don't have matching screwdrivers and am pretty inexperienced. I did have a gunsmith look at it today and found some more markings (attached if anyone knows what they might mean). The gunsmith said it was likely 1937-1939.
WWII German(most likely) The info you want is under that scope base, if it hasn't been scrubbed.
