56A (58a) 1956 1½a on 1½d green Q Elizabeth II of Great Britain, wmkd St. Edwards Crown, perf 14, overprinted "1½ ANNAS" in error on this watermark, most of the known copies emanated through Southern Stamp Services packet making division who first discovered it while sorting out a shipment of mission mixture received from the Middle East, a very rare and difficult stamp, seldom seen and significantly undercatalogued.
