12 3 to 50 20 Fr. peoples help complete on registered letter with a set from "SCHAFBRÜCKE (Saar) 26.2.52" to Schattendorf / Austria with arrival postmark, in perfect condition, cover left opened and there fixed, reverse decorative closure vignette "IMOSA Int. Topic stamps exhibition Saarbrücken", new photo expertize Ney VP (2017), Michel 200.- (for lots)