Better go back and find the rest of it. I found this on the internet.....By far the most common Civil War "snake" buckle, this particular style was used by both federal and confederate soldiers. Manufactured in England and imported into the south, several northern units wore this style of belt plate and English accoutrements acquired from captured blockade runners. Missing the other belt loop keeper, the buckle has a nice light olive patina. Identified in John Geiselman's museum collection by his inventory listing.
Oh man! I saw two of these snakes at a flea market table north of Gatlinburg, Tn. Two weekends ago. They had a price of $2.00 on them. They looked exactly like this and had small groove where the inside like where these hooked to the other metal pieces. And on the inside back they had a weird floral or wheat design of some kind just offset of the middle.
very cool finds. Although tye likely do date to the civil war period...these suckers have been in use by the british going back to the 1600's at least.