Great Britain 1919 Express Air Mail, SG372,413aGreat Britain 1919 Express Air Mail, SG372,413a. A superb example flown at the 2s 8d per oz rate pre paid with a 2d blue and a 2s6d olive brown both tied by Parliament St. circular date stamps for 'NO. 10. 1919'. A very fine cover flown on the AT&T (Air Transport and Travel Ltd) inaugural flight, flown on a De Havilland DH4a piloted by J. McMullin, which was scheduled to leave on the 10th but delayed by fog until the 11th. This short lived AT&T