Key type stamps are stamps of a uniform design that were widely used by colonial territories in the 19th and 20th centuries. == Origins == The idea was invented by Perkins Bacon who used it to print stamps for Trinidad (1851), Barbados (1852) and Mauritius (1858), all featuring the same Britannia design.
Key type stamps are stamps of a uniform design that were widely used by colonial territories in the 19th and 20th centuries. == Origins == The idea was invented by Perkins Bacon who used it to print stamps for Trinidad (1851), Barbados (1852) and Mauritius (1858), all featuring the same Britannia design.
Source: Wikipedia "Key type stamp" · CC BY-SA 4.0
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