Power: 81 hp[B] Date of manufacture : 1925 - 1931
Production Manufacturer: Caterpillar Type: Agricultural Crawler tractor Factories: San Leandro, California, USA   Peoria, Illinois, USA Original price: $4,000 (1931) Mechanical Chassis: crawler Cab: Open operator station. Transmission: 3-speed gear Photos Caterpillar Sixty photos... Dimensions & Tracks Weight: 19,000 lbs 8618 kg 72-inch tracks Full dimensions and tracks ... Belt Pulley Diameter: 16 inches 40 cm Width: 10 inches 25 cm RPM: 650 Speed: 2640 ft/min 804.67 meters/min

Caterpillar RD7	Power: 75 hp[B]	Date of manufacture : 1935 - 1940

Caterpillar RD8	Power: 114 hp[B]	Date of manufacture : 1935 - 1936

Caterpillar Seventy	Power: 77 hp[B]	Date of manufacture : 1933 - 1937

Caterpillar Seventy-Five	Power: 103 hp[B]	Date of manufacture : 1933 - 1935

Caterpillar Sixty	Power: 81 hp[B]	Date of manufacture : 1925 - 1931

Caterpillar Sixty-Five	Power: 87 hp[B]	Date of manufacture : 1932 - 1933

Caterpillar Ten	Power: 15 hp[B]	Date of manufacture : 1928 - 1932

Caterpillar Thirty	Power: 40 hp[B]	Date of manufacture : 1925 - 1938

Caterpillar Thirty-Five	Power: 48 hp[B]	Date of manufacture : 1932 - 1934