Jon78,
This one is almost like yours,
sold on Siegel
Sold for £1,400
GREAT BRITAIN, 1864, 1p Rose Red (33; SG 44). Plate 225, lettered R-K, full original gum, rich color, Fine, the rarest regularly issued plate of the 1864 1p stamp, the key to completing an unused collection of all the plates, SG £3,200
