1 1 / 4 piastre on 25 pfennigs yellow orange and 10 para on 5 pfennigs green as additional franking on 20 para postal stationery envelope as properly franked (! ) registered mail from CONSTANTINOPEL 4 / 3 90 to ANVERS / Belgium, with arrival cancel ANVERS 6 MARS 1890. expertized. Willmann and photo expertize Dr. hardening: "perfect perforated and in faultless, used condition. " Michel estimated 1.500.-