1919, Germania 20 Pfg., type II, with overprint \"Gen. Governor Warsawa\" and further overprint \"Poczta Polska\" in the very rare colour gray ultramarine, on piece, neat tied \"Sosnowice / 20.2.19\", well perforated and centered. Under of the stamp old examinations (among others L. Schmutz), besides Petriuk BPP and photo expertize Stephen Petriuk (2019) : \"the stamp is in a very good quality and used very rare. \" Michel 3.500.-