Noted at the Canterbury Aero Club fuel pumps at Christchurch International Airport on Thursday the 17th.
Piper PA-31-310C Navajo C ZK-MJF (c/n 31-7912089) joined Skywest Aviation Ltd of New Plymouth on 27-02-2015.
Its early history is mentioned at :-
Next in line was the Cessna 402C ZK-VAD (c/n 402C-0076) this is the RidgeAir Ltd's example.
This is also a 1979 aircraft which came into NZ from Australia for Vincent Aviation Ltd in March 1997.