Two discs attached at center with rivet. Overlay disk transluscent. The lower disc shows Earth, the sun, planets and star patterns against a black background. The upper disc is a semi-transparent overlay with six circular markings. Created by Mark Avino Date Created 09-21/2011 Source Smithsonian Institution Keywords Apollo Program; Human Spaceflight; Instruments; Missions; Moon; Space Rights and Restrictions Usage conditions apply
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