1939 Registered P&O cover to London with "TRISTAN DA CUNHA" type VII cachet in violet on the front, franked by South Africa 1/- pair and 1938 Voortrekker Commemoration 1d and 1½d pairs cancelled violet oval "SHIPPING POSTMASTER / 17 FEB 1939 / CAPETOWN" with further strikes on the front and reverse. The first cover from Tristan we have seen with the uncommon Shipping Postmaster cancels of Cape Town. Photo on Page 226. (Image1)