1860 (Dec. 15) New York N.Y. to Brevorde, Hannover, orange buff cover bearing 3¢ dull red (26) block of four and single, all cancelled by red NYFM circular open grids, matching "N. York 'Paid 10' Hamb. Pkt. Dec 15" credit exchange cds, Hamburg 1861 oval and Polle (1.4) cds backstamps; no bottom flap, bottom left 3¢ trimmed by edge placement, Very Fine, A rare use of 3¢ 1851 issue block of four and single prepaying the 15¢ Bremen-Hamburg treaty rate effective Jul. 15th 1857. Estimate  $400 - 600. $0 (Image)