Air Mail cover 1936 (10 July) Air, "Banknote" 50f. ultramarine with 1938 Miners 2f. 15 and Music Festivals 1f. 75 + 75c. on 1938 unflown envelope from Cannes to Denmark without transit/arrival markings. Very fine although philatelically inspired. C.14, F.F. 2300. Photo