I will have to take look at my recent gun show purchase earlier this year at the Greensboro Gun Show, where my friend Michael Briggs displays his discoveries and published books on NC Longrifles Schools.
On Sunday afternoon, a feller was walking by my tables wheeling a golf cart. In the golf bag were three antique firearms. To this day, I kick myself for not buying all three of them. One was an unmarked half stock percussion rifle, and the other was a heavily rusted Enfield Rifle Musket. I passed up on those two and bought the remaining firearm, a full-length US Springfield Model 1816 musket, converted, dated 1827 on the lockplate. The background on these was he was on a crew tearing down an old house in the area, and upon removing a wall, he found these three standing up.
I'll get some photos and post it here when I can get time. I think the guns were likely behind the wall probably at the end of the Civil War or during Reconstruction. Somehow, the 1816 stayed a well-preserved musket, mint condition on the screw heads, smooth finish in the bore, evidence of blueing remaining on the furniture. The real standout are the initials on the bolster, "H & P", Hewes & Phillips of Newark NJ, the contractor doing the percussion conversion.
Thanks for your help on the inspector and workmen's stamps.