Navy Arms imported Pedersoli copy of an 1863 Springfield. The lockplate is usually bright on the reproductions (the Miroku reproduction Model of 1864's had 'case hardened' lockplates).
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First, you got a steal of a deal. Congratulations.
Navy Arms imported both Pedersoli and Miroku (Japan) reproductions of the M1863 Springfield. Of the two, the Miroku is closest to the original, and is highly sought after today. Still, the Pedersoli is no slouch, and is better than the common Armi Sport (Chiappa) that we see today.
As we see by the pictures, the Pedersoli is the M1863 Type II (1864) version, with solid bands and band springs. The Miroku was sort of a hybrid, with band springs but with clamping bands like in the Type I. Also, the Miroku M1863 had a two-piece stock, cleverly joined under the middle band. This is so well done that it can be hard to notice.
As well as a Miroku M1863, I have a Miroku M1861 that I converted to an M1855, with a functional Maynard lock. This was my go-to gun when I was reenacting.
Collecting Italian (or Japanese) reproductions has become a hobby, like collecting originals. In some cases, the prices of originals and reproductions have become comparable. The advantage of the reproductions is that they are safer to shoot.