6 Kr. on yellowish green silk paper, I. issue 1851, having bright colors, three sided full to wide margins, at the bottom with close cut versehenes copy in properly franked, extreme rare insuranced- and colordirectly mixed franking with edition typical cut 6 Kr. pale yellowish green, II. issue 1857, on international letter, a small cover envelope in the size approximate 14, 5 x 6 cm, to Switzerland. Transported from "eels 6 7 58" over of Württemberg railway mail, small chickadees and Zurich to Vallee de Joux (6 Kr. Postal Union taxe, 6 Kr. forwarding franking). Photo expertize Irtenkauf BPP (05 / 2017) "a nice cover, with extreme rare insuranced- and colordirectly mixed franking between 1. and 2. issue, very fine. So far is no an additional cover me this franking combination recorded. " - franking rarity