Belgium 1931 // 1937, group of 7 covers and a postcard posted to England and India incl. : 1933 cover with "Utilisez la Poste Aerienne" bi-lingual slogan cancel with outline of airplane ;  1932 cover with "Utilisez la Poste Aerienne" bi-lingual slogan cancel with black airplane; 1931 Francis Field authentication hand stamp on card to Paris and back; 1937 HALT card to Calcutta; 1937 Bruxelles to Calcutta via Karakachi with a flight cancelled box cachet; and multi franking airmails.