The following 7 lots are from experiments and trials in phosphor coatings, produced mainly in the late 1950's. 2d. block of fifteen (5 x 3) on unwatermarked paper, without gum, no phosphor reaction, pencil annotations on reverse.
The following 7 lots are from experiments and trials in phosphor coatings, produced mainly in the late 1950's. 2d. block of fifteen (5 x 3) on unwatermarked paper, without gum, no phosphor reaction, pencil annotations on reverse.
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Suchauftrag anlegen![[UU] [B+] 1952-67 Wildings:](https://images1.bonhams.com/original?src=web/logos/spacer.png "Quelle: Bonhams London")
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