I just purchased a 1917 Erfurt with very odd unit marks. Very small font and stamped long the edge of the strap. From top down. I hope they are indeed unit marks. The pistol was billed as a police, but it's not a police rework. And I don't believe the markings are police.
These are the sellers photos and kind of fuzzy. Will post better and more complete photos when it arrives.The unit mark is:
17.3KP.FLA.M.C or(G?).ABT. 912
Thanks, Ron