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The CLB 75 Tank was a U.S.-produced, prototype armoured fighting vehicle built by C. L. Best's Traction Company of San Leandro, California. Best was a rival of the Holt Manufacturing Company in producing caterpillar tracked vehicles. Among Best's products was the CLB 75 hp (56 kW) 'Tracklayer' The tank was developed by putting an armoured hull over a CLB 75 sometime between late 1916 and early 1917.