1843, 6 Rp black with vertical background lines, type I, 86 stamp of the sheet, cancelled by red Zurich rosette postmark, having bright colours and excellent margined extremely fine copy in perfect condition, expertized Fulpius and photo expertize Jean Claude Marchand SBPV (2023) \"in perfect condition. Excellent visible background lines. \", Michel 1.600.- (Zumstein no. 2 S)