I am parting out a 1978 John Deere 100 lawn tractor. The part number is in the title and it may fit other years or models. This tractor is NOT the cheap Home Depot 100 series mower.John Deere yellow knob off 1978 100 lawn tractor. This is in very nice shape and a little faded as shown. U.S. shipping only. Thanks.I am parting out a 100, 425, 420, 332, 322, 318 and a 316 Onan so contact me if looking for something specific.