15 Pfg postal service seal slip of paper on correctly franked cover from "BAD SAAROW 18.8.45" to Lübeck with notation "return / to fractional. No postal service traffic" (to West Germany), stamp corner fault right above and left at the bottom slightly compressed, cover at the bottom opened, in this kind scarce commercially usage, the graphic the problematic post-war circumstance in the postal service traffic showing, new photo expertize Kunz BPP (2018) "the test specimen is genuine and correctly franked cover franked", Michel 450.-