1991 NI 39p bright mauve issued on non-phosphor Fluorescent Coated Paper (FCP) instead of Phosphorised ACP (no afterglow under UV – effectively a missing phosphor error) in cyl block of six Q1Q1. Only a handful of such blocks are believed to exist. Spec X
XNL63a 1991 NI 39p bright mauve Fluorescent Coated Paper (FCP)cyl Q1Q1 block
Sale!Original price was: £105.00.£96.60Current price is: £96.60.
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