J. STEVENS ARMS ANTIQUE 41 CALIBER DERINGER PISTOL: Antique pistol with 4'' part octagon, part round approx. 41 caliber barrel marked J. Stevens & Co. Chicopee Falls Mass. Pat. Sept 6 1864. Nickel frame. This appears to be a conversion or variation with the Old Model pistol as it has flat butt as opposed to the standard birds head butt. Break front action has some looseness. Sold with 2 spare metal stocks, neither fits gun.