Name of this sportcar is Escartus, built in New Zealand.
According to the link below there were 7 cars made by a company in the city of Napier.
Year: 1979
Chassis: Triumph (Herald, Spitfire)
Engine: Leyland P76 V8 engine
Body made of fibreglass
4-seater coupé body
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Further I couldn't find more information.
Kind regards,
Spider Murphy