无日期无邮票寄镇江本埠信封, 贴半分横四连欠资票, 其中一枚为DUE为DE变体, 销黑色镇江中英文无日期戳, 封面右端盖另一镇江中英文无日期戳及椭圆框TO PAY戳; 品相中上.Chinkiang Postage Dues Covers Undated Binns unstamped envelope used locally bearing ?c. strip of four, one showing "DE" for "DUE" caused by weak printing of the surcharge, tied by circular Chinkiang handstamp with another strike alongside and "to pay" in oval. Fine. Photo