3 (2), 5 (2), 10, 20, 25, 30 and 40 Pfg imperial yacht on registered cover to London, violet stamp FRIEDRICH-WILHELMSHAFEN 2- / 5 / 06 (second numeral from day unclear) to London with arrival stamp. The cover was a little rough opening and has the as usual transport traces. Stamps partly small faults. Violet stamp are rare (study group 400,-)