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    • (May be the largest in the world.)
    • 1993

    Art reproduced from image depicting Mendeleev's Periodic System on on the wall of the Mendeleev Institute of Weights and Measures.

    • 1949

    In the amount of one thousand, this company scrip issued by Georgi Dimitrov Chemical Company is printed to look like a banknote. Backside of scrip has an illustration of the chemical complex, which is bustling with…

    • 1964

    Cachet and stamp depict a mushroom cloud from a nuclear weapons test. Cachet was created by Fleetwood and the stamp was commissioned by the United Nations Postal Administration. Postmark depicts the United Nations…

    • 1965-Jun-15

    Stamp issued to publicize the 20th Congress of the International Union of Pure and Applied Chemistry (IUPAC), held in Moscow, July 12-18. The names of both the organization and the host city are spelled with chemical…