South Africa 1926 6d green and orange Official, overprint type O1 (with stops), horizontal pair (London printing), showing overprint misplaced 4-5mm downwards resulting in partial "O" of "OFFICIAL" appearing in top perforation, SGO4var.
A fine mint pair with original gum. Some very faint gum yellowing, which is common and still of very fine appearance.
A rare Union of South Africa issue of the "Orange Tree", especially with this variety.
The Stanley Gibbons catalogue value is £650+.
