9 Kreuzer (Michel number 28 a) and 3 Kreuzer (Michel number 31 a) mixed franking 1866, cancelled by three ring postmark from "FRIEDRICHSHAFEN 25 4 66" on small folded letter, mailed to Calvisson (Gard) in France, red dual circuit transit postmark "De Bade" documented the takeover of the letter through the French post, excellent condition, expertized Thoma BPP