This is the A7-L pressure helmet worn by astronaut Alan Bean on the Apollo 12 mission launched on November 14, 1969.
The Apollo pressure helmet was a molded, polycarbonate shell with a bayonet base, bonded to the helmet neck ring, and was the male half of the suit neck-ring assembly. There were two configurations used on Apollo suits which were not interchangable, the earlier configuration was anodized blue, with the later configuration being anodized red.
Transferred to the National Air and Space Museum from NASA in 1971.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.