Yes; several marks on both barrels. They are barely visible, and I have gone to the internet to "German Proof Marks" attempting to see if any of them possibly match. (Without much luck)
"CAL" is clear, but then.....I can't read anything after that.
There appears to be a stamp of a man standing, but not really clear. There are Two "Crowns" on the flats, side by side, one larger than the other.
There is a mark on both which says "SO" Also, on the between the barrels bottom rib, there is a "S" which looks like a Sauer "S" on "modern" guns.
