South Africa SGO33a 1 1/2d with DIAERESES Top Right stamp variety Gold Blob

Official. 1944-50 Set 20A (= 1944 issue) 1 1/2d yellow-buff and deep slate-green (SUID-AFRIKA hyphenated medium format) SG type O2 opt (14.5mm spacing) WITH DIAERESES block of 4 from R3-4/3-4 on the sheet the upper right stamp showing the prominent constant variety Gold Blob on Headgear. (R3/4) Mounted mint Faintly yellowish gum (and lower pair with a tiny crease) Still fine fresh appearance. A remarkable and excessively rare block with the blob variety in the diaeresis setting which requires separatye Part 1 listing alongside SG O33b. Ex Matheson (Union Handbook O99)