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Format Text Remove constraint Format: Text Rights In Copyright Remove constraint Rights: In Copyright Subject Chemists Remove constraint Subject: Chemists Subject Commemorative postage stamps Remove constraint Subject: Commemorative postage stamps

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    • 1973-Jun-10

    Semipostal stamps commemorating the 150th anniversary of the birth of Louis Pasteur. Includes two postmarks depicting Pasteur, with Pasteur also featured on the first day of issue cancel. A semipostal stamp is a postage…

    • 1922 – 1936

    Nine small postage stamps in various denominations issued in commemoration of the 100th anniversary of the birth of Louis Pasteur in 1922. The large semipostal stamp was issued in 1936 and includes a surtax for the…