I grabbed this one really quick. The other car I believed to be rivet-less has rivets (doh). Let me check my backup hard drive to see if I am mistaking it for another car. It might have been a Belvedere II convertible from NJ.

The VIN attached is from out here in OR. I can dig out the certicard for this one too if you'd like.

lol my "several" has quickly turned to a quantity of one. Reading this thread makes me think it was either a supply chain (rivet shortage?), machine breakdown, or tag error work-around.

I'm shooting pretty wide here.