I'd be hesitant to call this an Indiana, or Midwest, gun based on the lock plate. The gun has much stronger Pennsylvania characteristics, and is likely from that state. While the lock appears to have a good fit, I am not sure it is original to the gun. This is based on the uneven amount of side facing wood around the plate; while appearing good across the bottom, the wood almost disappears above the back half of the lock plate...often a sign of a changed lock that is slightly taller than the original plate. I also think it's slightly odd that there is stock wood erosion above the lock at the breech, but not forward of the percussion drum, possibly indicating minor restoration in that area that might hide a lock replacement. I'd speculate it's a PA gun and not from the midwest based on the patchbox and couple of inlays present. The long two screw tang may be an old repair of a shorter original tang (note its uneven width), so should not be used when trying to locate the gun. Shelby Gallien