1 Sgr. Black on rose, variety "inverted watermark", having full margins and having bright colors outstanding quality, neat cancelled with number postmark "325" - Dirschau (government Bez. Gdansk), expertized at best Flemming BPP and expertise Voigt VP (2019) : "genuine and immaculate", provenance: collection Rolf Pingel (130. Auction Dr. Reinhard Fischer March 2013)