1916 2 1/2p on 1pi violet & buff, l.h., well centered, faint diagonal corner crease, not mentioned on the accompanying 1917 (!) Royal certificate, v.f., ex-Houtzamer. Only 25 issued, with 13 recorded to date, one of which is in the Royal collection, cat. £8000 (Cat No. SG 3) (Image)

Cat. £8000, Est.US$7,000

1916 1d mauve, sheet margin block of four, unused without gum as issued, v.f. (Cat No. SG 12) (Image)

Est.US$1,000

1916 1d mauve, "ONR" for "ONE" error, sheet margin single, unused without gum as issued, faint creasing, still v.f., rare, cat. £2250 (Cat No. SG 12f) (Image)

Cat. £2250, Est.US$1,500

1916 1r red, unused without gum as issued, with "6" numbered at upper left, h.r. just showing through at top, v.f. (Cat No. SG 13) (Image)

Est.US$600