6 penny "Elster bridge" on thin coarse paper in mixed franking with further Plauen issues and good Soviet Zone Michel number 57 b as corner margin piece lower left, properly franking on registered letter from 15.12.45, from Michel number 2 w are so far only two more properly franked examples known, expertized Herbst BPP and photo expertize Jens R. Kunz BPP "good overall condition", Michel 550.-