1867: 25 Kurus bister brown, unused no gum, very fresh. An extremely fine example of this MAJOR RARITY OF TURKEY. The Michel catalogue mentions that only 9 copies exist and as such it certainly belongs to the rarest stamps of the world. Certificate Guy du Vachat BPP. Scott J15, Yvert taxe 14, Michel Portomarken IV = 25.000 EUR. (Image)