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Creator ArtCraft Remove constraint Creator: ArtCraft Subject Postage stamps Remove constraint Subject: Postage stamps Subject Chemists Remove constraint Subject: Chemists Subject First day covers (Philately) Remove constraint Subject: First day covers (Philately) Date 1976 Remove constraint Date: 1976

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    • 1976

    Cachet created by ArtCraft depicts a male and female chemist working in a laboratory setting, with text reading, "A Century of Modern Chemistry." Cover signed by Glen Seaborg.