1887年北京寄美国实寄封1件,贴日本邮票5钱1枚,销北京2月1日海关戳,经天津,上海中转,有天津2日蓝色海关戳,上海2月黑色海关戳,日本票于上海日本客邮局盖销,并销上海2月25日日本客邮局戳,另有横滨3月8日戳,三藩市3月24日红色中转戳,及3月30日到达戳,邮路清晰,保存完好ChinaPostal HistoryImperial Post1887 (1 Feb.) an envelope to U.S.A. cancelled by Peking Custom c.d.s. transit via Tientsin with Tientsin Custom c.d.s. (2.2), bearing Japan 5s tied by a seal showing I.J.P.A in Shanghai (25.2) alongside, with Yokohama (8.3), San Francisco (24.3) transit c.d.s., and (31.3) arrival c.d.s., fine cover.