It may sound daft but 50 odd years ago before my Vette ownership, There was a Blue Chrome Bumper Coupe parked in Gas Street (Club Land Birmingham) late at night, I spotted it on about three different nights, I stopped to look at it - it was lovely, but for some reason the sticker in the corner of the door glass "Astro Air Flow Ventilation" stuck in my memory as something nice / cool and I always associate it with that rare sighting of a Vette