Cornet Mouthpieces - Lot of 2, 1 Bach, 1 unstamped Bach or Bach copy

Description

Two Cornet Mouthpieces, 1 Bach, 1 unmarked Bach or Bach copy (?).
The one on the left is a Bach 10 & 1/2 C cornet mouthpiece, obviously marked by removal with pliers on the shank and outer edge of the rim, however the rim face is smooth; the cup is in very nice condition.  It's entirely playable.
The other appears to be Bach in every way, virtually identical outer contours, very similar cup size and depth, but no stamping.  None. Not a trace.  Don't know why and don't want to speculate. It's actually in very good condition, a few of the very small nicks and dents that all mouthpieces get with a little use, and a light scratch on the shank from insertion into a cornet. My eyeball and thumb say it's a 10 & 1/2 C like the other, or very close to it.
I'm finding homes for several trumpet, flugelhorn and cornet mouthpieces from a friend's estate; I mostly included it as a point of reference for the other one.
So if you want to try some 10 & 1/2 C cornet mouthpieces, or if your cigar box of mouthpieces isn't quite full (most of us have one), or if you want to own what might be an interesting piece of Bach history,  now's your chance.