细节
cover -- 1940-44, the selection of seventeen envelopes flown from various locations in Britain to either Argentina or Uruguay, some with typewritten "North Atlantic Air Service" etc., two with purple handstruck "BY TRANSATLANTIC/AIR SERVICE", a good range of adhesives from either the 1937-47 (values to 1/-) or 1939-48 (values with 2/6d., both colours, 5/-, 10/- ultramarine) issues, mostly good to fine