A 4d pre-decimal Machin stamp in sepia colour, issued during the reign of Queen Elizabeth II in 1967. The stamp on the left is CB phos, the stamp on the right features a missing phosphor band, making it a unique error variety. Being mint never hinged, this stamp is in pristine quality and would be a desirable addition to any stamp collection. This missing phos is not catalogued because it is impossible to find unless it has the CB attached to it.