1929 2½d registered envelope to Windhoek, South West Africa, with a ½d added, tied by GHANZI 21 MAR 29 datestamps. The registration number and town have been filled in by hand. Gobabis 22 MAR and R.L.S. Windhuk 28.3.29 transit and arrival cancels are on the back of the cover. Although South West Africa is neighbouring Bechuanaland, very little mail is seen going between the two countries.