Fordson Model 'F' agricultural tractor on cleated steel wheels, by Henry Ford & Son, Inc., Dearborn, Michigan, U.S.A., c. 1919. Engine: 4-cylinder side valve petrol/tractor vaporising oil. Originally made with trembler coil ignition, the flywheel being part of the generator; now converted to magneto ignition, the trembler coil box is still in position.