Introduced in 1935, the Registered Magnum was the culmination of several years of experimentation by leading handgun authorities of the era with 38 caliber revolvers built on 44 caliber frames which leading to the development of the 357 Magnum cartridge. Hand made on order by Smith & Wesson's in-house craftsmen and individually registered to the owner, the Registered Magnums show a level of fit and finish beyond the already high standard the firm set during that era making them contenders for the title of finest revolver ever made. Issued registration number 4073, this revolver is equipped with a King .064 inch red post front sight on ramp reflector base and an King 5/64 inch "U" notch rear sight; both are set into the signature full-checkered barrel rib and top strap. Fine casehardened colors on the serrated trigger and checkered hump back hammer. The sides of the hammer are horizontally serrated. Fitted with walnut checkered grips with silver S&W medallions. The factory letter confirms the revolver's configuration and that it was shipped from the factory on September 6, 1938, and delivered to a Parker Williams in Whitinsville, MA. Complete with the original correct factory box.