Does it look kinda like this?
This is a repro made by Pedersoli in Italy. It's a great rifle. I load black powder cartridges with cast lead bullets, lubed with my own concoction. I've only shot it out to 300 yards, but it's pretty stupid accurate. The double set triggers are nice, it can be set to break at just a couple ounces when set.
If I had everything I needed, and plenty in the bank, a REAL Sharps would be very nice to have.
ETA, yeah, that's a Borschardt patter rifle... falling block but internal hammer. Very nice. Even has the sight base on the buttstock for extreme long range shooting from a very odd laying-on-your-back position. The .45-100 would reach 1000 yards easily, and would probably be pretty accurate out to 12 or 1300 yards.