This may be a quibble, but I wonder why there are multiple listings here for "Czech Airlines", which include numerous "OK Jets" (OK-KBK, OK-EBG, OK-IFN, for instance) which wore titles "Czechoslovak Airlines" / "Ceskoslovenske Aerolinie". (Sorry I can't make the accent mark over the C.) Of course the airline was renamed "Czech Airlines" after the partition of Czechoslovakia, but I feel the listings should still reflect the old name. Indeed, some of the planes may never have worn "Czech Airlines" titles.