Re the Gazelle
The prototype Sa340-001 flew with a tail rotor from the Alouette 2 and a rigid rotorhead, the fenestron didn't fly until 1968 on -002. 002 is in a museum at Toulouse.
Search for Aerospatiale Sa340
The production prototype didn't fly until august 1971.
An early pre production aircraft is an the museum at Newark.
It didn't start in Squadron service with the UK mil until 1974.
Wildcat is referred to as a Lynx MK10 by a number of people!!