black datestamp on cover to Hamburg, Germany franked with horizontal strip of three 1855 10c Green, Type I (13, positions 98-100R1), margins to in, tied by magenta grids, backstamped "Boston Br. Pkt. Apr 9", "7" credit to Prussia, red boxed "Aachen 22 4 Franco" handstamp also ties, arrived Hamburg April 23, very fine and attractive in every regard, a wonderful use of the imperforate 10c Type I, 1988 Philatelic Foundation certificate