I wonder if the file marks on the trigger plate are 'kills' ??
The beauty of an old shooter like this is your opportunity to try new things regarding finish,bluing etc.
Here's your chance to try all those things out that you would never risk on a collector piece or even a good shooter. Every move you make that 'works' for you is like a bull's eye at the range ... so much fun.
I am a sucker for the old Erfurt's too ... the stamps are like reading a history book.
Have fun magazineman and
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