This protective helmet was possibly worn by Frank Borman during the launch of the Gemini 7 mission in December, 1965. The helmet was fitted with communications equipment, and was worn under the hood-like, integrated helmet of the G5-C spacesuit.
The helmet portion of the suit was attached with a zipper closure, and could be unzipped and pushed away, though it was non-removable during flight. It consisted of a fixed polycarbonate visor which provided a "fish bowl" effect for the astronaut - namely he could move his head within the helmet rather than moving head and helmet at the same time.
Transferred from NASA in 1967.
Transferred from NASA - Manned Spacecraft Center