1958 cover sent registered to Johannesburg with two 3d and a 2d cancelled TSABONG 30 APR 58. A boxed TSABONG B. P. registration handstamp with the number inserted in pencil is on the front of the cover. On the back are Tsabong, Brakpan and Krugersdorp transit cancels. Tsabong is a small town in the Kalahari Desert in the Kgalagadi District. A scarce canceller.