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Item no. P1863 (cover)
Type: cover
Country: USA
Date of use: 5 May 1942
Business cover used by the company Chemical Works MALLINCKRODT in New York, a chemical factory (operating since 1867) producing various products, also chemicals for photographic purposes that were described in “Mallinckrodt Photographic Chemicals” (e.g. issue 1943). It was for some time (since 1880) a major producer of bromides for photography. Mallinckrodt published manual (several times reissued) “The Chemistry of Photography” (1931). The cover bears US military censorship marks used during World War II.
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- Mercredi 24 Octobre 2018
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