10.5.1930. London - Salonica. First delivery of exclusively flown mail to Salonica by Imperial Airways. During the period 15.4-10.5.1930 the route Skopje (Yugoslavia) to Salonica was effected by Orient Express and not by plane. Air cover with departure cachet "LONDON S.W.1 / 9 MY 30" & arr. "ΘΕΣΣΑΛΟΝΙΚΗ * 12.V.30". VERY RARE! ONLY 12 FLOWN. (Hellas FF107).