2 Sgr. Black on blue, variety "inverted watermark", having full margins and having bright colors extremely fine copy, neat cancelled with number postmark "103" - Berlin, scarce and in the catalogue value clearly undervalued variety, expertized Kastaun BPP and photo expertize Flemming BPP (2001) : "without defects" and expertise Voigt VP (2019) : "genuine and immaculate"