1938年上海经香港寄汉口航空封1件，信封正面寄信人标注英文航空经香港要求，贴京版烈士加盖暂作8分四方连，另贴航空条，销上海9月6日戳，有汉口21日到达戳，此时武汉会战正值如火如荼阶段，寄信人为邮件免于战事原因耽搁，因此选择绕行香港之办法，反应武汉会战历史背景，保存完好，难得ChinaPostal HistoryRepublic of China1938 (6 Sep.) airmail cover to Hankow bearing Martyrs 8c. on 40c. in block of four tied by Shanghai c.d.s, with postal instruction on the cover air mail via Hong Kong, showing Hankow arrival c.d.s. (21.9) on reverse. During the time of the Battle of Wuhan, the sender does not want the mail transit across the regions engaged and choose to send the mail by air.
