United States. (Portugal - Trans- Atlantic Air Mail). 1941. Air Mail envelope addressed to Scotland bearing United States meter 'U.S. Postage 0.8 Paid/ NCR Meter' dated 'July 11 1941' with instructional 'A Steamer To Europe &/ Air Mail From Lisbon' in green on face with 'Opened by Examiner/ 5515' label applied in transit.
Nice item of Trans-Atlantic mail. The Air Mail instructional noted by "Ian McQueen' in Airmail Instructional Handstamps in 1941 in green.
Ex Alistair Kennedy.