Is there a way to tell if this is a repro or original?

 

Those are original parts, OEM.

 

Can you tell me how you figured this out?

 

Repop wheels have a different finish on the rubber. Your original wheel is worn smooth (you can still see some of the original grain on the rubber near the spokes) . As an example, here are some photos of the repop wheel in my hardtop.

 

Thanks