EDIT: Total brain fart . . . It's a model 81 . . .Duh!
Found this one in a local pawn shop. $110 after a little dickering.
Brought it home, wiped it down with some BLO and installed a cheap scope and a set of rings I had laying around. I've got a shorter set of rings on order. Haven't had a chance to shoot it yet . . . too dang hot . . . I did function test it with a couple of Colibri's though.
No serial number. Barrel stamp indicates 1965 (I think).