In 1868, Remington began converting percussion revolvers for use with metallic cartridge skirting by the Rollin White patent issue through a partnership with Benjamin Kittredge who paid Smith & Wesson $1 for each converted revolver. Only 4,575 revolvers were converted ahead of the expiration of White's patent in April 1869. This revolver has the White patent marking: "PATENTED APRIL 3d 1855" on the side of the cylinder and "7" on the right side of the barrel and frame and front of the cylinder. The barrel has the standard "pinched" blade front sight and markings on top. "3278" is on the bottom at the muzzle and on the left side of the front strap. The grip frame also has "52" on the back strap on the left and "3158" on the back strap on the right. The matching original serial numbers are found on the bottom of the barrel, the trigger guard, and left side of the butt. The grip numbers are a bit faint but appear to match.