Cover franked with 1947 40c carmine 'Antarctic Territory' MAP issue and pair 1952 10p carmine 'Isabella the Catholic' issue (SG 374 & 409) tied by multiple strikes of PUERTO NAVARINO cds in purple dated 14 JUL 1954. Addressed to USA with MAGALLANES transit cds on reverse. Puerto Navarino is the small postal agency on Navarino Island, Tierra del Fuego and is part of Cabo de Hornos commune, one of the most southerly populated places in Chile. Very scarce.