Jack,

Sounds like a good find.

The last 16g M-12 at the local firearm-porium (Balt. area)
was tagged $375, but condition was maybe 50%, at best.
I think they sold a ribbed one for less, but it was rough.
(They just got in 2 more, 20 & 12, Pidgeon Gr; priced accordingly.)

Your M-12s fit pretty well, right ? . . .
Might look good under the tree.

Best of luck,
Tom

(Sorry, no PM.)