Great Britain 1966 4d British Birds (Phosphor) error, SG696/9phGreat Britain 1966 4d British Birds (Phosphor) error, SG696 9ph. A superb unmounted mint, with full original gum, top right hand corner marginal block of four with bistre omitted affecting all four stamps. Offered with an example of the normal matching block for the purposes of comparison and presentation. Very rare to find this rare QEII error as a positional block so fine, especially without any gum toning as normally seen. BUY NOW: Order online, by