Third gun from the collection. Beautiful 1816 Spring Field Flintlock Artillery Musket dated 1827. After some research, here's what I know.
Excellent Condition, original. Markings include "Spring Field 1827 (Eagle) US" on the lock plate, and S and the other side plate four "proofs" including what looks like a V, possible P, and I can not determine the others. It also has "U.S." on the top of the butt plate, an "S" on the upper band and the lower band. Also has letter "JT" in front of trigger guard. I could not get good images of the inside of the trigger guard but that appears to have the letter "A". It appears to have the inspectors cartouche in oval on left side of stock.
Excellent Condition, original. Markings include "Spring Field 1827 (Eagle) US" on the lock plate, and S and the other side plate four "proofs" including what looks like a V, possible P, and I can not determine the others. It also has "U.S." on the top of the butt plate, an "S" on the upper band and the lower band. Also has letter "JT" in front of trigger guard. I could not get good images of the inside of the trigger guard but that appears to have the letter "A". It appears to have the inspectors cartouche in oval on left side of stock.