1932年1月6日美国寄长沙进口封, 后转递往北京, 经上海盖不同上海邮戳, 封背有长沙及北平日戳. 少见.China Covers and Cancellations Air MailIncoming Mail 1932 (6 Jan.) envelope to Changsha bearing U.S.A. 5c. Roosevelt tied by New Haven, Connecticut machine postmark, redirected to Peking with 1929 Air 15c. and grey-blue Par Avion etiquette added and tied by different Shanghai postmarks (27.1) to pay for the internal air mail route. The reverse with Changsha and Peiping c.d.s. Unusual
