Lot 20072 – 20pa. blue, lithographic printing, perf. 12 1/2 x 13

20pa. blue, lithographic printing, perf. 12 1/2 x 13 1/3, mint block of four, also a vertical pair, the upper stamp was originally contiguous with the south-east stamp of the block of four (which has a gum bend), some minor toning, very fine, and extremely rare pair of unused multiples; one of three recorded blocks, cert. RPS (1968), Hass (2008)Provenance: John Henry Edwards Gilbert