Air Post: "USA" AND JET 20c Red, blue & black

Tagged

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

20c
Color
?
Original catalog color of the stamp.

Red, blue & black
Print method
?
Method of process of imprinting designs on paper.

Lithographed & Engraved, Giori Press
Perforation
?
Holes punched between stamps to make separating easier.
— Basic philately terms for amateurs

11
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