The Corvette has always had it's own twin flag logo & badging, which pays homage to it's racing cred, and to Louis Chevrolet's French ancestry.
However, despite having it's own unique badging, the bowtie is incorporated into the Corvette badge, as seen in the following examples from various decades:
More from here (where I got the pic links from):
http://www.core77.com/posts/24297/a-...s-part-1-24297
http://www.core77.com/posts/24298/A-...e-Logos-Part-2