Power: 30 hp[B] Date of manufacture : 1936 - 1939
Production Manufacturer: Massey-Harris Type: Standard-tread tractor Factory: Racine, Wisconsin, USA Mechanical Chassis: 4x2 2WD Steering: manual Cab: Open operator station. Transmission: 4-speed gear Photos Massey-Harris Pacemaker photos... Dimensions & Tires Wheelbase: 78 inches 198 cm Weight: 3700 lbs 1678 kg Front tire: 28x5 Rear tire: 44x10 Full dimensions and tires ... Pacemaker Serial Numbers Location: On rear-left portion of tractor frame. Belt Pulley Diameter: 12 inches 30 cm Width: 6.25 inches 15 cm RPM: 832

Massey-Harris Challenger	Power: 35 hp[B]	Date of manufacture : 1936 - 1939

Massey-Harris No. 1 12-25	Power: 27 hp[B]	Date of manufacture : 1918 - 1919

Massey-Harris No. 2 12-22	Power: 24 hp[B]	Date of manufacture : 1920 - 1922

Massey-Harris No. 3 15-28	Power: 31 hp[B]	Date of manufacture : 1922 - 1923

Massey-Harris Pacemaker	Power: 30 hp[B]	Date of manufacture : 1936 - 1939

Massey-Harris Pony 11	Power: 12 hp[B]	Date of manufacture : 1947 - 1954

Massey-Harris Pony 811	Power: 15 hp	Date of manufacture : 1951 - 0000

Massey-Harris Pony 812	Power: 15 hp	Date of manufacture : 1951 - 1957