presol,
Could we please see a few more photos? Perhaps a full length shot, another of the top of the tang and breech and one of the forearm, taken from the side, a few close-ups of the cavity in the butt and another of the lock internals.
Q. Is the barrel swamped? Measurements at breech, mid-point on length and at muzzle?
Q. Is there a rear sight? Missing?
Q. It appears that the front sight on this piece was staked in?
Q. Are the design elements made of lead or pewter and do the four (4) round elements (?) penetrate, completely, through the stock, from side to side?
Q. Is there a trigger plate?
Q. Is the trigger integral to the trigger plate or pinned separately to the stock?
Q. Is the bolt for the tang threaded into the trigger plate or into a square nut, inlet into the stock and secured, in place, by the front of the trigger guard, just ahead of the bow?
Q. It appears that there is some remnant of the thumb plate, intact. Does it show anything discernible?
The additional inletting/shaping into the bottom of the cavity is a particularly curious element/feature.
Certainly presents with a host of questions looking for answers.
To our ALR membership: If I've used the wrong nomenclature or terminology, kindly substitute the word(s) 'thingie,' or 'whichamacallit.'