I know this is a old message, I know for sure that this car is the first project of a CAR2000 by Mantua in 1976 this the complete model:
In 1980 the CAR 2000 was improved with a radio tray and the "basculino"
as you can see here:
The same year Mantua started the project for the CAR2000 F1
In September 1980 Mantuastarted also the Manta project
I live very close to Mantua Model factory and I often speak about vintage models with Franco Poldi and his son Massimo. I also got a lot of information from "unoaotto" a RC magazine pubblished by Mantua from the middle Seventies up to the beginning of the nineties.
If you need infos about Mantua Vintage feel free to ask...
ciao