1918-22 £1 purple and black on red Break in the scroll and Broken crown and scroll, S.G.55a,b,

marginal block of 4 from the upper right corner of the sheet, Plate Number '1' in the right margin, Positions 11-12/23-24, with Row 1/12 the Break in the scroll flaw and Row 2/24 Broken crown and scroll, good colour, light diagonal crease affecting the lower right stamp, fresh, original gum. A VERY RARE BLOCK.

There is a pencilled note in the margin on the reverse 'Purch. G.P.O. Dec.1937' which was one month prior to the availability of the King George VI replacement