Unpaid small mourning cover posted from "ΠΑΤΡΑΙ (9)*17 ΜΑΙΟΣ 66", via "ΑΘΗΝΑΙ" and "ΠΕΙΡΑΙΕΥΣ" with manuscript "pour Bateau Francais" to Constantinople. On arrival taxed with 10l. yellow-orange on blue, 01 instead of 10 pos.71 + 40l. greyish rose on grey-lilac and cancelled with "ΚΩΝΣΤΑΝΤΙΝ (ΤΟΥΡΚΙΑ)*25 ΜΑΙΟΣ 66". Part of flap missing. Opened for display. RR. (Hellas 18dNd + 20IIa).