COLLINS 51S-1 32S-3 KWM-2 S-LINE - PUSH ON KNOB - p/n 543-8039-002 543-8039-000

One (1 pcs) genuine Collins 51S-1 KNOB Push On Type - Steel spring

Used with OFF-ON-STBY-CALL CW - RF GAIN CONTROL - EMISSION - Rockwell Collins 51S-1 receiver

and

Used with BAND - FREQ CONTROL - EMISSION - METER - Rockwell Collins 32S-3 KWM-2 KWM-2A transmitters

or

Could be used as replacement knob for other Collins S-line equipments.

Genuine Collins 51S-1 knob - removed from fully working 51S-1 receiver 

Part No. Collins 543-8039-002 543 8039 002 - 32S-3 transmitter

Part No. Collins 543-8039-000 543 8039 000 - 51S-1 receiver