1938, two covers with Tristan da Cunha cachets incl. double-circle 'TRISTAN DA CUNHA' in black adressed to South Africa with 1d Postage Due and arrival pmk. Simonstown (25.1.38), and a postcard with blue cachet on South Africa 3d definitive adressed to California, nice pair! (Katalog-Nr.: SG. C 6 etc.)