1 piastre on 20 Pf, overprint blue black, in perfect condition unused with full original gum and slight hinge traces, in each case twice signed Pfenniger and Bothe BPP and photo expertize Jäschke-Lantelme BPP: "fresh colors, well perforated and is in faultless, unused condition. " In this quality very rare stamp! Michel 3.000.-