Lot 40473 – 1911 Somerset House £1 dull blue-green, an incredible mint vertical block of 20

1911 Somerset House £1 dull blue-green, an incredible mint original gum vertical block of 20 comprising the first two vertical rows of the upper pane with sheet margins on three sides, only three stamps hinged, a stunning multiple of the utmost rarity and most likely the largest surviving, a major Edward VII rarity being the largest known multiple from this printing of this value.