SOUTH AFRICA 1990 (VARIETY) 21C NATIONAL STAMP DAY MISSING SILVER
21c National Stamp Day traffic light/plate block x 10 with silver practically missing from stamps in the centre column. Scarce. Fine unmounted mint. SG705a; SC788var; SACC722a-726a
Note: although catalogued as a mising colour, it's actually a very weak printing of silver, resulting in the near complete loss of the background
