1900 locally addressed envelope bearing a vertical pair of 1d, the lower stamp having the varieties 'I' and stop after 'R' omitted. The stamps have been cancelled BLOEMFONTEIN 31 MAR 00. This error is stage 2 of the progressive reglet flaw on position 9. The cover has a vertical fold. A very rare variety, particularly on cover. (SG 102g, catalogued £250 off cover)