Fender Footswitch, 0994052000, Modern Style, one button, 1/4 jack footswitch

Used for: Champion 300, Champ 110, Champion 30, Blues Deluxe, M-80, Dual Showman (86), Princeton 65, Frontman 25R, FM 65R, X-25R, FM 210R, Rumble 75 Combo, Rumble 150 Combo, Rumble 150 Head, Rumble 350 Combo, Rumble 350 Head