Nigeria, 1936 Air Mail envelope addressed to Calcutta India, bearing King George V 1Sh ; 6P % 2P (SG 37, 40 &41) (Scott #41, 44, 45) tied by Nigeria 29-10 double ring cds. with hand-stamp 'Air Mail / First Despatch / Lagos - London / 29-10-36' in black. arrival cds on back. - Partial first flight leg. The upper left side of the envelope is
