1896年7月22日重庆寄上海商业封, 贴银贰分票, 销紫色重庆信局方框型日戳, 旁有红色P3A型PAID戳, 封背盖8月6日蓝上海工部日戳及邮差手写记号; 相信存世只有三封盖有上海红色P3A型PAID戳混用的实寄封, 为研究上海邮政系统乃至中国邮政史的集邮家不可或缺的罕有素材.Chungking 1894 Third Issue Covers Combination with Shanghai Local Post: 1896 (22 July) a commercial envelope to Shanghai bearing 2ca. rose-red tied by Chungking boxed datestamp in purple and a light strike of Shanghai boxed "PAID" type P3A in red with Shanghai courier post handstamp below and on the reverse, the back also shows the Shanghai Local Post c.d.s. (6.8) and postmans pencil notation. A charming cover displaying a rare combination of markings. Thought to be the only third issue cover used in combination with the Shanghai Paid handstamp. A highly desirable item for any collector of the Shanghai postal system. Photo