Entire letter fr. with 10sld Austrian Levant stamp, canc. "LLOYD AGENZIE COSTANTINOPEL*30/1" to Syros. Marked "20", fr. on arrival with 20l sky-blue canc. "ΣΥΡΟΣ*?.ΙΑΝ.69". Signed M.Tseriotis. A rare and important postal history item. (Hellas 27a).