David Brown  25C Tractor with DB AK4-3 3.1/2in Bore Engine
David Brown  25D Tractor with DB AD4-3 3.1/2in Bore Engine
David Brown  30C Tractor with DB AK4-3 3.5/8in Bore Engine
David Brown  30D Tractor with DB AD4-3 3.5/8in Bore Engine
David Brown  50D Tractor with DB AD6-3 3.5/8in Bore Engine