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French stamp issued to commemorate the Centenary of Photography.
1939, 24 April (date of issue)
Private collection of Krzysztof Slowinski
Single stamp. It shows (left) portrait of Joseph Nicéphore Niépce [1765 - 1833], (right) Louis M. Daguerre [1787 - 1851], and (middle) Franþois Arago [1786 - 1853] when he announced the invention of photography to French Academy of Sciences.
Catalog number: Michel 446, Scott 374