145201 1861 DIE 2 1d ALPHABET IV PLATE 51 WATERMARK INVERTED (SG42Wi) FINE UNUSED RIGHT MARGINAL BLOCK OF FOUR.

1861 DIE 2 1d ALPHABET IV PLATE 51 WATERMARK INVERTED (SG42Wi) FINE UNUSED RIGHT MARGINAL BLOCK OF FOUR. Fine unused right marginal block of four 1861 Die 2 1d alphabet IV plate 51 WATERMARK INVERTED (SG42Wi) lettered CK CL DK DL with full sheet margin at right. Several short perforations at foot and BPA Cert states 'is genuine, perforations strengthened between CK CL', but inverted watermarks very easily seen. Rare exhibition item, cat £3200.00 as singles. (Ref 145201).