Phosphor graphite imprimatur

Anything to do with the small format Wilding definitives of 1952-67.
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l2ggy
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Joined: Sun Sep 08, 2013 1:16 pm

Phosphor graphite imprimatur

Post by l2ggy »

I am looking for information regarding imprimaturs drawn from the 1959 wilding phosphor graphite issue. Were multiple sheets drawn from the print run or only a single sheet examination and subsequently retained by the Post Office/ The Postal Museum? Thank you
Colin Davies
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