[Andy S]

Having just consulted the oracles of all things cobra etc ie mssrs Filby & Ayre, I have stumbled, researched, and discovered that there was a predecessor to the Viper known as the Cheetah Viper, it had smaller front arches and an almost slab like rear arch, very very similar to the one in the advert, book states that only a few were made between 84-86, comments are Zero authenticity, Mickey Mouse Styling, Dire build quality & last but not least Dubious Engineering.
The above info is from The Filby Files Vol 2, Classic Kit Cars 1953-1985