Foundry worker - 铸造工人 8f Vermillion & dark brown

Without Gum

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.

Vermillion & dark brown
Print method
?
Method of process of imprinting designs on paper.

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

10
Watermark
?
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