Netherlands 1935 - 1938 group o 6 KLM First flight covers, incl.:  KLM/BCA 1936 July 1st Rotterdam-Doncaster special cover (only 37 flown); 1937 The Hague Netherlands First Flight Airmail Cover To Bandoeng Dutch Indies; 1936 First Flight 011 Amsterdam - Wenen A137a ; 1936 KLM Amsterdam Netherlands Airmail First Flight Cover  To Budapest Hungary, (450 mail items on this flight.). 1935  to Italy Amsterdam - Milann.