Semi-Postal: Kings of Belgium Leopold I, Albert I, Leopold II 10fr + 10fr Deep blue

Surcharged in Red

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

10fr + 10fr
Color
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Original catalog color of the stamp.

Deep blue
Print method
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Method of process of imprinting designs on paper.

Engraved
Perforation
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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
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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