One I haven't seen at Christchurch before is the SAAB SF340A ZK-CIY2 (c/n 340A-135).
First flown way back on 04-11-1988 as SE-F35 before taking up OH-FAD, SE-KCU, SP-KPF and N135GU.
It ferried into Auckland on 09-01-2018 and became ZK-CIY2 with Air Chathams Ltd on 24-01-2018.
Seen above arriving into Christchurch early this morning.