David Clark H10-76 aviation headset assembly. Includes ENC microphone. The 9-volt battery connector is there but unit is missing the battery box/switch. It does show LED on when battery is connected to the unit. Was able to test the audio in by using a converter on the unit's plug to listen to audio but was not able to confirm microphone output with my setup. Overall in very good condition. Comfortable and intact ear pads.
eBay