Stampless cover with fine strike of 'TRISTAN DA CUNHA' type VIII cachet in purple on front (SG C10). Addressed to UK, taxed on arrival with '1½D I.S.D.' TAX marking and '1½d' marking on front with added 1937 ½d emerald and 1d carmine 'Postage Due' issue (SG D27/D28) tied by MILFORD HAVEN cds dated 16 MAY 1949.