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Detail of the lock subassembly on the front of the suit's neck ring.

Picture 1 of 2.

The front is embossed with is labeled "Assy 6356" and "sn-1202" (or perhaps "12C2"). The label on the wedge-shaped part at the right begins with "Assy A6L-1010".

The model of suit used for the earlier Apollo flights was the "A7L" (to be replaced by the "A7LB" suits on later flights). This designation indicates that it is the seventh suit design for the Apollo program ("A7"), and that the vendor for the suit is International Latex ("L").

However, the A7L retained many parts in common with its predecessor A6L suit, and the lock subassembly appears to be one of them.

Note the two white index marks, used to help align the helmet for donning. The astronaut would depress the gold, rectangular button to open and engage the neck ring's locking latches.