English: Three panel flown "triptych" cover carried around the world (New York-Shediac-Botwood-Foynes-Southampton-Cairo-Karachi-Singapore-Hong Kong-Manila-Guam-Wake I.-Midway I.-Honolulu-San Francisco-New York) via PAA (Boeing 314 Clipper) and Imperial Airways (Short S23) including FAM 18 (Northern Route) First Flight, June 24 - July 28, 1939
来源
The Cooper Collections of Aeronautical Postal History
2008-05-25 08:58 Centpacrr 650×1100× (431528 bytes) Three panel flown cover carried around the world (New York-Shediac-Botwood-Foynes-Southampton-Cairo-Karachi-Singapore-Hong Kong-Manila-Guam-Wake I.-Midway I.-Honolulu-San Francisco-New York) via PAA (Boeing 314 Clipper) and Imperial Airways (Short S23) in