Apollo A7LB space suit helmet disconnect ring, measuring approximately 11″ in diameter, marked in white text, "Use with red helmet ring only," and engraved on the opposite side, "PN-2877, SN-115." The attached button assembly is marked "ASSY 9357-05, SN 1060." Manufactured by Air-Lock, this red anodized ring forms incomplete suit-side neck ring hardware, including the outer shell for the helmet disconnect that would be attached onto the suit portion and mate with the red hardware at the base of the pressure helmet. The inner workings of the ring are not included. In fine condition.