I think I found my first curved clip while roll searching. It's a 1964 Lincoln. I am not really seeing the Blakesley effect, but all the other characteristics are there. The "belly line" and smearing of devices are both there and easy to see. All I have with me is an iPhone, so I hope you guys can tell. I can't believe this has made it in circulation since 1964. I got these from my local gas station.