Yes, Doc,
That is why makers are encouraged to establish a touch mark and date the item.
That was always something I didn't feel I had time to do, as it would have just slowed me down more than I wanted.  I think that out of all the 1,000's of horns I made, I only put a touch mark on one of them, at the customer's insistence.  I actually bought two different horn making companies and neither of their owners had used touch marks.  So, shame on all of us.
John (Bigsmoke)