Probably operating a flight for CSA Czechoslovak Airlines. Photo taken from the Queens building viewing area. Delivered to the Czechoslovak Government as OK-BYS on 07 Mar 1972. WFU 26 Sep 1983 and transferred to Balkan Bulgarian Airlines as LZ-TUZ. WFU SOF in Jan 1998. Used as ground trainer for anti terrorist forces and last noted on 20 Jul 2020.