One of the many MiG-21s flying during Co-operative Key 2001. To avoid double serials within the Bulgarian serial system this MiG-21 was reserialled 427 by 2004.
407(75094407) One of the many MiG-21s flying during Co-operative Key 2001. To avoid double serials within the Bulgarian serial system this MiG-21 was reserialled 427 by 2004.