South Africa 1926 ½d Spectacular Pre-Printing Papercrease

1926-27 Pretoria ½d black & green (SG 30var). VF/M/UM right marginal horizontal block of six, the centre stamps with SPECTACULAR PRE-PRINTING PAPER CREASE resulting in vertical printing flaw easily visible down the pair. The unperforated right margin proves a Pretoria printing. Spectacular, scarce. See additional image below where paper crease visible on reverse.