1 Sgr. Black on dark rose, having bright colors and having full margins extremely fine copy, neat cancelled with number postmark "1748" - Cologne railway mail Sped. Office 10 (government Bez. Cologne) in red, photo expertize Brettl International Association for Philatelie Experts (2014) : "genuine and immaculate. " and expertise Voigt VP (2019) : "genuine and immaculate"