Transvaal 1910 Commercial Perfin on Card, JW Jagger Co

1910 PERFINS IN USE: Johannesburg to England: Picture postcard franked KEVII 1d PERFINED "JWJ & Co" (the perfin used by J.W. Jagger & Co) tied by Johannesburg cds ..03/10 leaving the perfin well visible in contrast to body of the stamp, the perfin showing signs of DOUBLING OF PERFORATION under magnification. See scans. Picture side of card shows "Trek Laager, Matabeleland, Rhodesia." VF, perfined stamps rare on cover or card thus. See additional images.