GMC's total of ~550,000 purely 6×6 models, including the DUKW, formed the overwhelming majority of the ~675,000 six by six 2 + 1⁄ 2-ton trucks, and came in less than 100,000 shy of the almost 650,000 World War II jeeps. truck production, and 70 percent of the total 2 + 1⁄ 2-ton trucks. GMC's total production of the CCKW and its variants, including the 2 1⁄ 2-ton, 6圆, amphibian DUKW, and the 6×4, 5-ton (on-road) CCW-353, amounted to some 572,500 units – almost a quarter of the total WW II U.S. Army bought between 1939 and December 1945, across all payload weight classes, some 812,000, or just over one third, were 2 + 1⁄ 2-ton trucks. Of the almost 2.4 million trucks that the U.S. A large minority were built with a front mounted winch, and one in four of the cabs had a machine-gun mounting ring above the co-driver's position. The CCKW came in many variants, including open or closed cab, long wheelbase (LWB) CCKW-353 and short (SWB) CCKW-352, and over a score of specialized models, but the bulk were standard, general purpose, cargo models. The original 'Deuce and a Half', it formed the backbone of the famed Red Ball Express that kept Allied armies supplied as they pushed eastward after the Normandy invasion. Army, that saw heavy service, predominantly as cargo trucks, in both World War II and the Korean War. The GMC CCKW, also known as 'Jimmy', or the G-508 by its Ordnance Supply Catalog nr, was a highly successful series of off-road capable, 2 1⁄ 2-ton, 6×6 trucks, built in large numbers to a standardized design (from 1941 to 1945) for the U.S. Restored CCKW 353 Cargo truck with open cab, machine gun ring, and front-mounted winch

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