Souvenir sheet "German stamp exhibition DEBRIA, Leipzig", plate flaw III "slanting, white line over 1 of the date 3.9.1950" at the right sheet margin" (only in a part of issue occurring), in mixed franking on correctly franked franked registered cover the 2. weight step from Chemnitz 3.12.50 to Schwarzenberg with reverse arrival stamp from 45.12.50, the franking is faultless, the cover right slight fold crease and slight transport traces, photo expertize Paul BPP (2018), Michel 750.-