G.B. 1931,  Great Britain,  Cover sent from Croydon to Karachi,  Label in blue,  BY AIR MAIL,  Typewritten inscription "Carried on the 1st Flight involving Night Flying between Baghdad & Basra"  .  Cover sent from Croydon to Karachi,  blue Air mail label,  Typtwritten inscription "Carrie on 2nd Flight involving Night Flying between Baghdad and Basra."