I'm trying to establish the highest session number used on machine B1 to produce the UK versions of these stamps. This is for Machin and Union Flag stamps.
is the version inscribed World Stamp Expo on the stamps, with GB in the
data string, and the session number is the 6-digit number shown -
A5GB13 B1-003881-22 (and itemised at the foot of the receipt).
The highest number reported to me so far is 4974
We have been told that "5,000" were produced, but I think this refers to 5,000 sessions. As it is possible to get 99 stamps per session, it seems likely that 16 strips (x 6 = 96 stamps) were produced for each session, making a total of 80,000 strips produced for each design.
Demand from Europe would have been high as always, and the dealers didn't even have to make the trip to the UK for Stampex!
Many thanks to those who contributed by comment or email.
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