Lot 30542 – 1923 2s6d Postage due colour trial imperforate irregular block of three printed on gummed, wove unwatermarked tinted paper

1923 2s6d Postage due colour trial (4th series – 21st Jan 1924) imperforate irregular block of three printed on gummed, wove unwatermarked tinted paper mounted on brown card annotated with the official colour description “Lemon / Purple / S.D.I”, a spectacular and unique showpiece

Note: A series of 24 different colour trials were produced at Somerset House from a specially made Royal Mint plate of four impressions of the 1/2d die, this is from the fourth series of six in purple on different yellow tinted papers. In the place of the missing 4th stamp can be seen a manuscript annotation “To HM” (His Majesty) and now resides in the Royal Philatelic Collection