Semi-Postal: Daisy 10c + 10c Green, Gray & yellow

Printed on two kinds of paper: Fluorescent with violet fibers, Non-fluorescent with mixed red and blue fibers

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

10c + 10c
Color
?
Original catalog color of the stamp.

Green, Gray & yellow
Print method
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Method of process of imprinting designs on paper.

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

11 1/2
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.
#
?
Catalog number of stamp.
— Basic philately terms for amateurs