Thanks to all for your responses.
For background see my earlier post" "OPINIONS NEEDED ON LOCK" from earlier today.
I believe that, at the very least, the lock has a replaced frizzen. As far as the pan being welded, it's hard to say without actually having the lock in hand. Photographs can be deceiving, but I'm confident that none of those I posted have been manipulated.
The area of the barrel around the touchhole, and the hole itself, "looks" okay.
The front and rear lockbolts are definitely not newly manufactured, photo attached.
Appreciate all the input on this lock.