19.9.1926. Piraeus - Brindisi, by Aero-Espresso Italiana. Registered cover to Milano, franked with 3x2dr. litho. stamps, canc. "ΠΕΙΡΑΙΕΥΣ * ΣΥΣΤΗΜΕΝΑ * 18.ΣΕΠ.26", transit "BRINDISI * POSTA AEREA * 19.9.26", arr. at Milano on 21.9.1926. Special rubber cachets "SURTAXE / AΈRIENNE / PERCUE EN / NUMERAIRE" in black & blue (type AC4aB), applied on departure. Airmail fee was paid cash since the airmail stamps were not ready yet. Hellas: FF-18i.