Kurt, this are the comments my friend of many years in Georgia "Slamfire Wiggins" had to offer. He's been around these things and shooting them from the get go and I think he's on the money! Also, I don't think Shiloh had a damn thing to do with the rifle...seller put that in the title to get attention I bet.
Slamfire has an aversion to forums but I'm trying to convince him to come online despite his propensity to worship all things attributed to Frank Mayer.
His comments:
1) The lock plate is marked with the early percussion era C. Sharps, Pat. Oct 5th 1852. I've never seen a Shiloh breech loader with that mark on the lock plate.
2) The lock plate is of the early thick plate design.
3) There are no Shiloh makers roll stamp in the tradition place on the left side of the receiver. There also aren't any visible original Sharps markings either! They could have been polish off or thin it the receiver had some rust?
4) Hell, the whole receiver group drips original Sharps parts to me except the the Breech Block! Original receivers are hand finished and have warm rounded contour lines. Shiloh receivers look machine made with rather sharp & blocky contour lines. Even the Hammer screw, hammer and lever release pin appear to have original warm lines. I don't believe the breech block is original because originals have more rounded(pleasing edges)than the Shiloh Breech Block at the top.
5) I guess its possible that the custom order requested that an early percussion era lock plate be used instead of the latter cartridge era plate. But why the hell go to all the extra trouble?
I'm probably full of sheit as a Christmas Turkey, but I believe Shiloh built this Gemmer around and original receiver. It's kinda scary that the Barrel has Gemmer ST. Louis marks on it!!!!