Republic of India: Humber-Sommer biplane - भारत गणराज्य: हंबर-सोमर बाईप्लेन 1r Gray & claret

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

1r
Color
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Original catalog color of the stamp.

Gray & claret
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

14, 13x13 1/2
Watermark
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A pattern embedded in a paper during stamp producing process.
— Basic philately terms for amateurs

Asoka Pillar Multiple
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

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