The Smith & Wesson Model No. 1 First Issue Revolvers were the first successful American metallic cartridge revolvers. They were manufactured in 1857-1860, and originally advertised as Smith & Wesson's seven shooter, not by any model number. Soon after its introduction, however, the Model 1 name was adopted. The Model 1 referenced the S&W Number 1 cartridge that was used in the revolver. Only a little over 200 of the original First Type version were manufactured. On these early revolvers the recoil plate rotates with the cylinder and has a small key on the left side of the recoil shield. They also have a "bayonet" style barrel catch. The revolver features a low rounded blade front sight, "SMITH & WESSON. SPRINGFIELD. MASS." on top of the rib, a notch rear sight, Rollin White's April 3, 1855 patent marking (faint) around the 7-shot cylinder, rounded profile brass frame, and matching extremely low serial number "5" on the butt, barrel lug, and both grip panels. This lowest serialized No. 1 First Issue First Type Revolver known in existence is pictured and identified as once being part of the famed William M. Locke collection in John Parsons' "Smith & Wesson Revolvers: The Pioneer Single Action Models" on page 15 and in Frank Sellers' "The William M. Locke Collection" on page 358.