1919-20 15r on 1k orange with violet surcharge in mint top right corner marginal block, the bottom right stamp showing inverted surcharge, hinged at top leaving the bottom pair never hinged. A wonderful piece believed to be the only recorded in this combination; cert. Bloch (1983). (Image)

1920 50r on 15k blue and red brown perforated with black surcharge fresh used, a rare stamp (Image)

1919-20 mint group on stocksheet with 8 1920 surcharged issues incl SG 23, 30, 34 and 36, also 10r on 5k SG 9 (signed) and SG 41 etc. (S.G. £4500+). (Image)