A series of postcards in 5 languages, three of which I have been able to identify so far. Descriptions of one are Prince Islands, the other two are Burgazada/Antigoni.
İSTANBUL - Adalar⠀⠀ İSTANBUL - Burgaz Adası Prince Islands⠀⠀ Burgaz (Antighony) Island İles des Princes⠀⠀ İle Burgaz (Antigoni) Die Prinzeninseln⠀⠀ Burgaz (Antigoni) Insel Πριγκηπόννησα⠀ Νήσος Aντιγόνη (Μπουργάζ)
