Transvaal 1905 KEVII 1d Error Watermark Cabled Anchor

1905 KEVII 1d scarlet WATERMARK CABLED ANCHOR (SG 274b). Superb U example of this interesting error printed on paper intended for the Cape of Good Hope issue. Neat Johannesburg machine cds leaving monarch's profile well clear. The watermark additionally shows the marginal sheet lines, infrequently found thus. Scarce. (cv£325). See additional image below.