Vette was one of (at least) five figures designed by Mark specifically for the Convertors line, closely following the layout of their own Robo Car figures. These 1985 designs had car modes tailored to fit vehicles more likely to be spotted on American roads (hence 'American Mini Bot' on the cards). Multiple versions of these were produced, with the car interior/robot chest part being produced in different coloured plastic. For Vette, turquoise and yellow versions were made - there might be a third variant out there, as some of the others seem to have this many variants. Assuming Select didn't go for red plastic with the red painted metal (the latter always stayed constant, despite the black-coloured figure shown on the card art), black seems to be the most likely option for a third variant.
in case the name didn't give it away, Vette is modelled on a
The best thing about the American Mini Bots is that they all had individual faces, rather than doubling up as the Robo Car moulds did. Vette's is of quite a nice design, with a fair amount of detail for a small, cheap toy. The robot mode isn't the best proportioned from the range. The short back end of the Corvette means he's left with small feet, while by the same token the long, flat front leaves him with overlong arms. However, it all still just about hangs together, and the colours work a lot better in this mode, segmented into torso and limbs. The stickers and detailing help make him a little more visually interesting as well.
Of the American Mini Bots, Vette is second only to Bird, which isn't the worst place to be. The vehicle mode is nicely done, and the robot mode manages to avoid the pitfalls that get other Mini Bots, despite the slightly off proportions. The downside is he appears to be one of the rarer figures from the series, though he's still far from expensive.