Delivered new to the US register as N2720B in May 1982. To Swiss Air-Ambulance as HB-VFW on 31 Jan 1983. Back to the USA as N491DB in Aug 1992. To N491TS on 19 Nov 1999. To N39RE on 31 Mar 2000. To N600CF on 27 Apr 2004. To N601CT on 20 May 2004. To N601DF on 01 Sep 2019. Still current in 2024.