Stores Ref. No.: 10H/2206
The most common conenctor used in the RAF and RN during the second world war for headsets and helmets to interface with aircraft, and continued in service until the 1990s in the Shackleton for aircrew, and behind ejection seats in the Jet Provost and Canberra. It mates with the plug 119-Type.
There is a standard colour code for headset wiring, and the electrical contacts inside the connector have painted bands to indicate which contact is for which wire colour:
Red = TEL +
Blue = TEL - and microphone screen
Yellow = MIC +
Green = MIC -