Introduced in 1918, the Model 51 was developed from patents and designs from John D. Pederson of Pederson Device and Irwin-Pederson fame as a hesitation-locked blowback semi-automatic pistol with multiple overlapping safety features and good ergonomics. In addition to the two-line address and patent dates on top of the matted slide, the pistol features near full coverage, masterfully executed, factory quality floral scroll engraving. The Remington trademark is marked on the right of the frame, serial number on the left, and "OS" on the left and an anchor on the right of the trigger guard. It is fitted with checkered hard rubber grips with Remington/U.M.C. logos. Provenance: The Bailey Brower, Jr. Collection, author of “Savage Pistols”