ORIGINAL MARSHALL KNOB JCM800 JTM45 4100 2210 1959HW 1959SL 2203 1974X PUSH ON
Also Ideally these suit models: 1959HW,1974X,1987X,2245,2203,4100,1962,1959SLP,JTM45 2245,2061X. For Valvestate I Series and JCM800 models like 2210, 2205 and 2204/2204 side by side input jacks.