1937年汉口寄美国航空封1件，贴伦敦一版孙像5分1枚，京版烈士10分30分各一枚，50分2枚，销武昌9月26日戳，有广州9月24日中转戳，因战事原因，未能按航空邮简发寄，因此盖飞机因故未到由火车运来副戳，保存完好ChinaPostal HistoryRepublic or China1937 (20 Sep.) Air Mail cover to USA, bearing franking $1.45 on both side, tied by Wuchang c.d.s., Canton transit c.d.s. (24.9) on the reverse, also with boxed For some reason of the plane delay, transported by train in dark blue.
