Military Flight Sesto Calendo - Massaua, Stage Sesto Calende / Milano - Bracciano / Roma, special card franked on both sides with violet cachet "AEROCENTRO IDROVOLANTI - SESTO CALENDE" from Sesto Calende 1927-02-14 to Bracciano 02-15 and back, rare item (Longhi 27NCq / 1691)
6; Flugpost; FLUGPOST INTERNATIONAL; Italien