Chien-lung twin porcelain vase, 1736-1796 - 乾隆窑双连罐 , 1736-1796 $4 Olive bister & multicolored

Vertical

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

$4
Color
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Original catalog color of the stamp.

Olive bister & multicolored
Print method
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Method of process of imprinting designs on paper.

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

13
Watermark
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A pattern embedded in a paper during stamp producing process.
— Basic philately terms for amateurs

Unwatermarked
Issue Date
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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.
— Basic philately terms for amateurs