1 Pia. on 20 Pfg along with 2 Pia. on 40 Pfg Germania-Reichspost, always with Perfin "B. I. O. " (Banque imperial ottoman), on latter mirror traffic, on legitimate registered cover to the German Palestine bank to Jaffa. Posting stamp "CONSTANTINOPEL DP 1 a 15 / 3 02", reverse red sender printed form "BANQUE imperial ottoman" and arrival postmark. The 1 piastre stamp was at that time with a corner crease affixed. Registered covers with perfins are very few recorded