40th anniversary of Russian October Revolution: Hammer and sickle over globe and broken chain - 伟大的十月社会主义革命四十周年: 锤子和镰刀在地球和断链以上 8f Chocolate

Country People`s Republic of China
Denomination
?
Face value of a stamp, usually printed on the stamps.
— Glossary

8f
Color
?
Original catalog color of the stamp.

Chocolate
Print method
?
Method of process of imprinting designs on paper.

Engraved
Perforation
?
Holes punched between stamps to make separating easier.
— Basic philately terms for amateurs

14
Watermark
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A pattern embedded in a paper during stamp producing process.
— Basic philately terms for amateurs

Unwatermarked
Issue Date
?
Date inscripted on a stamp or cancellation for used stamps not necessary correspond to real date of stamp issue.
#
?
Catalog number of stamp.
— Basic philately terms for amateurs

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