2 1/2 piastre on 50 Pf with additional overprint "Specimen", this being a double impression! Certificate with photograph Dr. Hartung: "the "Specimen"-overprint is twice in same would strengthen available and about 0, 4 mm clearly in the vertical shifted. The stamp has original gum with clean hinge, is fresh colors, very well perforated and in faultless, unused condition. Se trata de the only with so far recorded become copy one Specimen stamp the international post offices abroad and colonies showing a double print! (former starting price 1000)