Portraits of Scientists: Chang Heng (78-139), Astronomer - 科学家肖像:张衡 (公元78-139),天文学家 8f Sepia, Buff

- Country People`s Republic of China
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Denomination
?8fFace value of a stamp, usually printed on the stamps.— Glossary
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Color
?Sepia, BuffOriginal catalog color of the stamp.
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Print method
?EngravedMethod of process of imprinting designs on paper.
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Perforation
?14Holes 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.
This stamp also has varieties
- Denomination 8f
- Color Sepia, White
- Print method Engraved
- Perforation 14
- Watermark Unwatermarked
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Issue Date
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