英国客邮局: 1896年8月25日寄英国Salisbury 双倍邮资封, 贴第三版银十六分票, 销紫色重庆方框型日戳, 旁加贴香港10仙票两枚, 销上海9月5日上海小圆日戳, 封背盖10月13日英国Salisbury 到达日戳. 罕见的双重邮资封.
Chungking 1894 Third Issue Covers - International British Post Office: 1896 (25 Aug.) double weight envelope to Salisbury, England bearing 16ca. tied by Chungking boxed datestamp with pair of Hong Kong 10c. purple on red cancelled by Shanghai c.d.s. (5.9) alongside, the reverse with Salisbury arrival c.d.s. (13.10). An unusual and scarce franking. Photo