1855 (Aug. 22) Bremen to Baltimore, Md., folded letter with "Bremen 22/8" origin cds and matching "By U. St. Mail" script straightline, red "3½ sgr." script Bremen credit rating to G.B., red London "Paid 24 AU 1855" transit, carried by Collins Line Atlantic from Liverpool Aug. 25 to New York arriving Sep. 6, black "New-York Am. Pkt. Sep 6" exchange cds with "42" cent due rating h.s., Very Fine, less than five recorded examples of both script style Bremen markings. Estimate  $300 - 400. Letter prepaid 7 silbergroschen for transit fees to G.B. under Anglo-Prussian Convention of 1852. Bremen struck "3½ sgr." credit marking in red. Bremen also struck the very scarce marking "By U.St. Mail" to explain desired routing from England. G.B. sent letter to U.S. in British open mails. Although Bremen considered letter a single rate, New York marked 2x21¢=42¢ postage due, double British Open Mail rate by American packet for a letter over ½ oz. $0 (Image)