Jim Lovell in his  bubble helmet  before Apollo 13  launch	Diagram showing  structure of helmet  and head rest	Helmet structures	Helmet structures	A7LB Neck  ring assembly for  CMP (top) and  CDR/LMP (bottom)

Left-Front-Right-Rear-Bottom views
Note center image shows white circular feed port.  Fourth image shows back of head rest, which acted as a manifold to route oxygen around inside the helmet.
Above 5 photos courtesy of Mr. Gary Kitmacher

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Comm Carrier
"Snoopy Cap"

Apollo 17 crewmen hamming it up aboard CSM "America"

Comm Cap Diagram	Side View	Back view	Chin Strap, Electrical  Connector, & Mics	Ear Phone Assembly	Comm Cap  & EMU Electrical Harness

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