250 Tsd on 500 Mark medium purple red, unperforated, used "DRESDEN old town. . . . . 23", certificate with photograph Weinbuch BPP: "genuine and carries an used within the period of validity, . . . . . . The Specimen is fresh colors, has the required gage for unperforated and is in perfect quality. Stamps this issue are in this kind rare. " Michel 900.-