1889 25c on 2d brown-purple with "broken N of CENTIMOS" variety in mint hr lower right corner marginal pair, very fine positional variety (SG £100+)
1889 25c on 2d brown-purple, horizontal pair from lower right corner of left pane, the left stamp variety 'Broken N' (R10/5), large part o.g. A fine positional piece. 920 possible, and scarce in this form. (Image)

1904-08 MCA 2s green and blue, mint (46) and used (21), 4s dull purple and green, mint (21) and used (3), £1 deep purple and black on red, mint (3) used (1), some minor faults, generally fine to very fine, an attractive valuable assembly (SG £19'285) (Image)

1925-32 £5 Violet & Black mint lower marginal block of 4, a spectacular and desirable multiple of this high value, cert. Brandon (2004) (SG £6'400 as singles) (Image)

1967-69 H.M.S. Victory 1/2d GREY OMITTED (sails etc) error, mint nh, very fine variety and rare as only one sheet of 60 existed (Image)