New Zealands first registered multi engined helicopter was Sikorsky S-58ET ZK-HIH (c/n 58-1663).
This Sikorsky was ordered as a military model HSS-1N Seabat (allocated serial number Bu150799) for the US military but was completed as a CH-34C in 1963 as part of an order for the West German Army.
It operated under several different German serials, including QC+463, WE+573 and 81+01 before being returned to the US in about 1974 to take up the US civil registration of N82846.
I suspect it was another of the Pratt and Whitney Canada PT6A "Twin Pac" conversion done by Orlando Helicopters.
ZK-HIH was assembled and first flown at Queens Wharf Wellington on 22-09-1974.
Its US registration was cancelled on 21-11-1974 and it was registered (leased) to Helicopters (NZ) Ltd of Nelson on the 25thBelow we see ZK-HIH at Timaru in late 1974 as captured by Lord Nelson.
Above we see the distinctive nasal cavities for the Pratt and Whitney Canada PT6T Twin Pac engines.
On 19-11-1979 it became PK-OBM with Airfast Services of Singapore. It was destroyed in a crash at Tugumaya in Irian Jaya on 04-11-1980.