60 Gr. Hitler, black olive and 24 Gr. Hitler, blackish brownish red, always variety \"unperforated\", as mixed franking on properly franked franked registered letter (slight transport traces) from \"SKAWINA 28.12.43\" to \"PITTEN 30. XII. 43\". Exceptional piece of evidence with properly franked mixed franking of two unperforated values (especially the very scarce 60 Groschen), expertized Jungjohann BPP, photo expertize Krischke: \". Such covers with unperforated stamps are very rare. \"