SEMI-POSTAL - Maurice de Broglie (1875-1960), physicist, and X-ray spectrograph 40c + 10c Dark gray

- Country France
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Denomination
?40c + 10cFace value of a stamp, usually printed on the stamps.— Glossary
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Color
?Dark grayOriginal catalog color of the stamp.
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Print method
?EngravedMethod of process of imprinting designs on paper.
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Perforation
?13Holes punched between stamps to make separating easier.
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Watermark
?UnwatermarkedA pattern embedded in a paper during stamp producing process.
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Issue Date
?Date inscripted on a stamp or cancellation for used stamps not necessary correspond to real date of stamp issue.
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#
?Catalog number of stamp.
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Price
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Price
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