A fine example with superior blade not as commonly found, with an 1885 scabbard modification.
This is a super example of the 1880 Springfield Armory Hunting Knife, Model 1880. Numbered 1428 in the bronze guard, and “U.S./Springfield” on the other side. The 8.5 inch bland shows only the lightest of use; basically light scuffing from wiping over the years, and never sharpened. The wool handle in in fine condition with a few areas of light chipping on the pommel end.
The 1880 scabbard has been modified to the 1885 pattern with the addition of the brass equipment hook, introduced in that year for bayonet scabbard, hospital knife, etc. Marked “R.I.A.” and has initials or full name of the soldier, ” DEE;” also “K 7476.” The leather shows little wear except at the back where the scabbard leather narrows upward toward the hook, and there wrinkled by the weight of the hook and usage.
I would think a hard piece to upgrade.