1971 30b black and bright blue, overprint inverted error, l/h marginal horizontal pair, fine unmounted o.g. SG 126a £900 (Image)

1971 5b on 3b reddish purple, horizontal pair, overprint inverted error, fine unmounted o.g. SG 138a (Image)

1971 5b on 3b reddish purple, overprint inverted error, top marginal example, centred to left, fine unmounted o.g. SG 138a (Image)

1972 25b on 40b black and red orange, l/l corner marginal block of 12 (6 x 2) showing position R 12/5 Arabic "5" omitted error, fine unmounted o.g. SG 145, 145b £2,500 (Image)