1855, 20 Rp Seated Helvetia orange, thin so-called silk paper, green silk thread, having bright colours and having full margins extremely fine copy, unused with original gum, photo expertize from the Weid \"genuine and faultless\" and photo expertize Emil Rellstab SBPV \"in perfect condition\", Michel 3.200.- (Zumstein no. 25 F) - in this condition rare stamp!