I remember as a teenager riding around in the back seat of my cousin's turquoise '63 Monza Spyder convertible. It was cramped and windy and cold back there. This was early summer, but it was the San Francisco peninsula......
That 'prototype' posted above by Doghead is I believe the one that was the 'prototype' for the Monza trim variant, and eventually given to Bunkie Knudsen's daughter. It's in other private hands these days.....
I think you're referring to the Peugeot 404 - mid 60's - mid 70's....? Not sure on years it was sold.