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Bus Turn Signal Switch & Knob

TURN SIGNAL SWITCH, March 1957-1965, 6 wires
Knobs for above switch: grey, ivory and black
TURN SIGNAL SWITCH, 1966-1967, 8 wires
TURN SIGNAL SWITCH, 1972 only
TURN SIGNAL SWITCH, 1973-1974
TURN SIGNAL SWITCH, 1974-1979