10 Rappen 1854 Prussian blue Seated Helvetia, so-called Strubel, Munich impression on thin paper with green silk thread, 1st printing, full margins on three sides, barely touched at upper right, black federal lozenge, fresh colour, perfect condition, expertised Berra, Berra-Gautschy AIEP photo certificate (2006) "faultless, genuine and good condition", Zumstein 1000.- CHF (Zumstein no. 23Aa)