Hollow metal cylinder, upper 2/5ths removed to reveal form-fitting mold; perforated semicircular steel cover.

Created:

August 20, 2015

Photographer:

Mark Avino

ID#:

A19600220000_PS03

Source:

Smithsonian's National Air and Space Museum

Owner:

Smithsonian Institution

Rights Usage:

CC0 (Open Access)

Terms of Use:

Smithsonian Terms of Use

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