National Productivity Year Stamps
These Post Office stamps were affixed to specially designed envelopes and postmarked on the first day that the stamps were issued.
14.11.1962 | NPY Emblem and Graph, Postmarked at Leadenhall StreetBUY NOW £125
2 1/2d Units of Productivity
3d British Isles
1s 3d NPY Emblem
Notes: All National Productivity Year covers with phosphor stamps are difficult to come by as they were the first commemorative stamps to have phosphor bands and therefore missed by most collectors.
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