German States – Bavaria. 1861 (May 4). Envelope from Nurnberg to New York, paying the 45kr rate for Prussian closed mail (6kr inland postage and 39kr for foreign fees as noted by ink), following the 1852 Prussia-USA Convention, with 1850-54 well margined 9kr and 18kr pair with complete to wide margins. each tied by « 356 » numeral hs with cds on departure below, »AACHEN/PAID 25 Cts. » indicating the fee credited to the USA, and « PAID 30 » New York Br. Pkt. cds’s in red at right, Leipzig transit on reverse; carried from Liverpool to New York by the Cunard SS « Persia »; an attractive and rare cover; cert. Stegmüller (2008).
Note: The Prussia-USA Postal Convention was applied not only to Prussia, but to German States which were members of the German-Austrian Postal Union, including 45kr up to 1/2 oz (2 loth) for South German States, or 13sgr for North German States and 38kr for Austria.