A correspondent in the USA has reported a significant phosphor shift which I don't think has been reported elsewhere.
"Recently I ordered a First UK Aerial Post Prestige Book from Royal Mail.
it arrived late last week, I noticed that the mixed Machin pane had its phosphor
bands shifted 6mm left. This leaves the right column of stamps with what looks
like a center band instead of two side bands, and the stamps in the center and
left columns have a double-wide band covering the right half of each stamp from
the stamp centerline to just inside the right perfs. Even the center label of
KGV has a phosphor band.
"I realize that phosphor shifts do not command the prices that a visible
color would get, but I’m not going to look a gift horse in the mouth. It is not
often one gets an EFO direct from the source. As these panes were printed as multiple panes on one sheet, I assume there
should be more examples out there, have you heard of any?"
If a picture can be obtained, I'll add it here in due course.
Do let us know if you have any significant phosphor shifts or any other errors. It's a very long time since we had a book with any duplicated pages!
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