BIDDING ON A LARGE 14″ VINTAGE MODEL No. S4042 BLUE POINT SUPREME OPEN WRENCH (BY SNAP-ON) 1-1/4″ X 1-5/16″ WEIGHT: 2 LBS. 4 OZ. UNBOXEDDULL GRAY FINISH, CADMIUM PLATING FINISH, I THINK. ONLINE INFO: In 1935 Snap-on introduced a new line of open-end wrenches under the “Blue-Point Supreme” name. According to the 1935 Snap-on catalog, the new wrenches were made possible by the development of a high-carbon alloy steel, which allowed a thinner and lighter design without compromising strength.The early production of the Supreme wrenches had the shank ground after forging, with the sides tapering to a flat strip in the center. The flat strip was used for the marking “Blue-Point Supreme” (and possibly a date code), and the wrenches were finished with nickel plating.This ground-shank style was soon superseded; by 1937 the Blue-Point Supreme wrenches were using a forged design with a raised rib in the center. The top of the rib was then ground and polished, and the sides were left with their natural forged finish. By this time the standard finish had become plated chrome.S-40421-1/4 & 1-5/161939Discontinued by 1953.No date code was marked on the wrench, but the cadmium finish suggests production during 1942-1945. PLEASE DO YOUR OWN RESEARCH, AS I AM NO EXPERT