The Penny Blue is frequently mistaken for a postage stamp of Britain. It is from a series of proof impressions which were made at the time Rowland Hill was looking at the new colours which were to be used for the stamps which were to replace the Penny Black and the original 1840 issue of the Two Pence Blue.
The Penny Blue is frequently mistaken for a postage stamp of Britain. It is from a series of proof impressions which were made at the time Rowland Hill was looking at the new colours which were to be used for the stamps which were to replace the Penny Black and the original 1840 issue of the Two Pence Blue.
Source: Wikipedia "Penny Blue" · CC BY-SA 4.0
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