1902-1913 "CAVALLE" inscription, complete set of 7 values (15c in orange) on two registered covers canc. "CAVALLE*16.4.13", via "SALONIQUE*21.AVRIL.13" and "CONSTANTINOPLE POSTE FRANCAISE*26.4.13", arr. "CONSTANTINOPEL 1-DEUTSCHE POST*26.4.13". (Hellas 10/17).