Way before the issue of postage stamps and the Pony Express there was a Postboy blowing a Post Horn ...
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| Great Britain - 7 July 1960 |
... commemorating the Tercentenary of the Establishment of the General Letter Office.
The British Discovery and Invention set in 1967 included 'Penicillium notatum'
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| Great Britain - 19 September 1967 |
For more 'P' related stamps just follow the links at Post Crossing on Sunday Stamps
