Bose A20 headset with U174 connector and straight cable.
Used in AW139 and AW169 helicopters.
Excellent condition and recently refurbished with new microphone, control module and straight connection lead. Over head interconnection wiring also new and replaced. Refurbishment cost £347. Basically other than scuff marks the headset is as new.
Complete with case manual and connection cable for headphone airplane use.