3 Kr. On bright gray ultramarine, vertical strip of three on properly franked folded letter from 5 ring \"8\" - BADEN 23 July (1860) to Frankfurt with railway cancel (TPO), left above and right always touched respectively cut into, above and at the bottom full margins, very fine fresh colours, with full content, an on cover scarce unit, a - especially on cover - scarce unit, the archive the Ar fair Baden has only a little more as a dozen documents with strip of three registered, by this is a new discovered piece from the \"senator Forsboom correspondence\", the now for the first time on an auction to be on offer can, Corresponding new photo expertize Stegmueller BPP (2023) \"originally and having bright colours, otherwise faultless condition. Properly franked franked letter for the 3. Distance zone. Strip of three of this stamp are on entire piece rare. \"