In the time between #25 leaving and coming back home, I'd been hunting about for an M68 to fill the hole in my collection, and never quite hit upon something at the right confluence of condition and price...until #25 was on its way home, ironically. And then this popped up:
https://www.gunbroker.com/item/1001653999
I was able to get in contact with the seller and confirm that an FFL was not required, and a deal was made.
Traditional witness mark:
All four cartouches are present, although a couple were a little harder to photograph.
Small "D" stamped between rear sight and receiver:
A sub-inspector(?) stamp I can't quite make out, and an "L" firing proof:
Bore on #25 is a bit better than this one.
I suppose this means I shall have to find an 1869-dated specimen!
