(Germany) 1887 Cover from Eilenburg. Franked with pair 10pf (right stamp small defect) sent to New York, cover advertised with 1¢ Postage Due tied by oval cancel to pay the advertising fee, tied on reverse United States letter carrier label with explanation for non delivery, cover ultimately returned to sender in Germany, cover opened for display & small tear at left, F.-V.F. Estimate  $100 - 150. $0 (Image)