Highly displayable early Apollo program pressure helmet, approximately 9.5 x 11 x 12, consisting of a transparent bubble, a feed port, a vent pad and duct assembly attached to the rear, and an anodized blue neck-ring. The lower portion of vent pad marked in black felt tip: “‘Not For Flight.’” In fine condition. This style of pressure helmet was worn by astronauts during training sessions for Apollo missions 7-10. The Apollo pressure helmet was constructed of a blow-molded, polycarbonate shell with a blue anodized aluminum neck ring; later configurations were anodized red.