Kluson® Chicken Head/Pointer Amplifier Knob SetChicken head style amplifier control knobs. Introduced on tweed-era Fender® amplifiers and used on '59 Bassman®, Blues Deluxe®, Blues Deville®, Hot Rod® series, Prosonic®, '57 Twin®, '57 Bandmaster®, EC Series®, and Bassman TV® series amplifiers.