At first glance I thought it was a copy of a generic ACW style rifle musket. Top of the barrel was marked SPESCO, Made in Belgium. Had a patch box similar to a 1804 Harpers Ferry, ribs along the trigger guard similar to some European muskets. Lock was marked Tower, 1861. Rear sight was a ladder style that reminded me more of an 03 Springfield sight than anything from the percussion era. It was approximately 12ga smoothbore. Looked pretty clean and I thought about bringing it home, briefly.