The Back pane (wmk Upright) has a 8mm Green Phosphor Broad band on each Stamp (miles clear of the perfs) which is Spec SB98b. Very Good Perfs
L21p 4/6 Violet Cover Booklet Aug 1960 Back Pane BROAD BAND RARE
Sale!Original price was: £275.00.£253.00Current price is: £253.00.
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