RAF Air Crew Observer Parachute Harness Anchor Strap Ring.
Fitted to the early pattern observer harness and the harness suit and parasuits.
The anchor strap was fitted to secure the Air Gunner to his position in the turret/aircraft.
This was to help him stay at his guns during any aircraft violent manoeuvres.
Most gunners did not use the anchor strap for fear of being trapped in the aircraft if it were shot down. Seen hanging at the base of the harness suit in the last photo.
The stainless ring is in Excellent condition.