I have obtained a group of French classics, and when sorting them, I found some copies with extremely thin and very transparent paper, for the "Peace and Commerce" and "Liberty and Peace" issues. The Yvert catalog lists GC paper, which is yellowish and thick, but nothing about this very thin paper... Does anyone know anything about it?
It's a bit difficult, but I hope these photos show the effect. The first one is on a completely white background, and the next two are on a background with written letters. This effect doesn't happen with regular paper or GC. It's also very noticeable when held by hand.
I'm afraid I can't make anything out from those pictures. Maury lists 145l (that's 145 L), "papier mince (transparent)", but doesn't show the existence of used copies.
The photos are poor, and the paper isn't transparent enough to read clearly (it's not pelure), but it's thin enough to see through. As I mentioned, this effect isn't possible with the regular paper used in this issue.
I've been searching the web for some Maury#145L to see if I could find examples or some information, but I haven't had any luck...My Scott and Yvert catalogues aren't specialised and there's nothing in them about "mincé paper". I don't know if the specialised versions include anything about it...but they should.
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