Red connector with locking tab as used on the A7L and A7LB lunar mission pressure suits (lower left gas connector), 2.75 x 1.75, made by Airlock and engraved with part numbers: “Assy. A6L-101023-08, SN-1010, Assy. 9192,” with the underside marked: “PN-2424R, SN-1010.” In fine condition.