This pistol has a compartment in the butt that opens to reveal a small cylindrical area used for holding percussion caps or patches.  The frame has deep engraving.  The grips retain 95% of the original varnish.  The barrel measures 2 1/2" in length.  Very light pitting toward muzzle.  Functions perfectly.  Approximately 48 caliber.

Foulding Trigger Percussion Pistol w. Compartment