1933年甘肃酒泉寄北平航空挂号封1件，贴北京二版帆船8分4枚，16分20分各一枚，伦敦二版孙像20分1枚，北京二版航空60分4枚，销甘肃酒泉4月17日戳，另盖甘肃酒泉中文长框挂号戳，寄邮件重量戳，邮件因延误交寄，另盖“此件交寄过时由次班飞机寄发”副戳，有兰州5月10日中转戳，及北平13日到达戳，保存完好，少见ChinaPostal HistoryRepublic Period1933 (17 Apr.) a registered airmail cover to Peiping bearing Junk 8c. (4), 16c., 20c., Dr S.Y.S. 20c. and Second Peking Print Air Mail Issue 60c. (4) tied by Kiuchuan c.d.s., with Kiuchuan rectangular registered chop and weight mark in gram cop. Due to late in transit, this mail can only be sent via next flight, on the reverse with Lanchow transit c.d.s. (10.5) and Peiping arrival c.d.s. (13.5)
