Great Britain 1969 Jersey 10s "Royal Court", SG28aGreat Britain 1969 Jersey 10s "Royal Court", SG28a A superb unmounted mint, Post Office fresh, bottom marginal example with full original gum. The most famous stamp error from the Channel Islands with iconic status. It is a very rare error of colour with the border printed in green instead of slate blue. A magnificent example of this key Jersey rarity, that occurred when during the final printing one sheet of 25 was accidentally fed into the press