It was actually a Star Chief with more chrome and of course the fantastic engine options.
The Bonneville everyone remembers came out as a hard top and convertible in 1958 and twins to the 1958 Chevy Impala hardtop and convertible. This '57 is very rare.
I thought you'd like a look at this extremely rare 1957 Pontiac Bonneville Convertible. 1957 was the first year for the Bonneville and it was only offered as a convertible. When it was introduced, the Bonneville was the fastest Pontiac ever produced. This Bonneville is number 116 of the only 630 produced in 1957.