£4,000 - £5,000
Great Britain SG 417 var 1918-19 10s Seahorse plate proof in black
1918-19 10s â??Seahorseâ??, imperforate plate proof in black on very thick unwatermarked paper, a block of 4 plus one partial impression from a special curved plate of nine impressions prepared by Bradbury Wilkinson, a beautiful and very rare item. SG 417
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