Completion of Yangtze River Bridge at Wuhan: Road leading to and over bridge - 武汉长江大桥竣工：通往桥梁的道路 20f Slate blue
- Country People`s Republic of China
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Denomination
?20fFace value of a stamp, usually printed on the stamps.— Glossary
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Color
?Slate blueOriginal 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.
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