South Africa SGO16/b 6d opt Official Drastically Missplaced Block of 12

Official. 1930-47 set 6 (= 1931 issue) 6d dull green and pale orange roto SUIDAFRIKA one word wmk inverted SG type O2 opt (12.5mm space) left marginal block of 12 (6×2) from R15-16/1-6 showing major leftward misplacement of opt so that OFFISIEEL falls on the vertical perfs and partly on the margin. Fine mint (top row mounted mint the bottom is Unmounted).R15/3 exceptionally also shows type variety Stop after OFFISIEEL on Afrikaans stamp. A spectacular and Rare multiple. Ex Matheson (Union Handbook O23 V5 V9)