Makes me feel old when this early version of the Dauphin is a puzzle. It is the newer versions of Dauphin that I struggle to identify, especially with all the re-designation that has happened from Aerospatiale to Eurocopter to Airbus Helicopters (and should I add Sud-Aviation?).
The Dauphin started off as the single engined SA.360 with Astazou XVI which first flew on 2 June 1972. The first twin engined SA.365 prototype flew on 24 Jan 1975.
I have always preferred the style of the tail and twin main wheel SA.365 to the skidded or later nose wheel versions, but I guess it is a matter of taste.