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The Penny Black was the world's first adhesive postage stamp. It was issued in Britain on 1 May 1840, for official use from 6 May of that year.Check Answer
The Penny Black was the world's first adhesive postage stamp used in a public postal system.
The first machine specifically designed to perforate postage stamps was invented in London by Henry ArcherCheck Answer
Its center design appears upside-down and it is probably the most famous error in American philately.Check Answer