Too Many Message Boards

Hiya,
Does anyone know what these came out of, and when? There's no identifying print on them, the underside has the car make and nothing else. I'm thinking late 70s or early 80s era:

[Image: https://i.ibb.co/PzLcMHB/oppo-0.jpg]

I'd be guessing 70s, rather than later, based on the colours and shapes. Be interesting to find out!

I'm leaning towards 70s too, I was hitting teen years early 80s so probably wouldn't have been interested.

Makes/Models from underside imprint:
Corvette Rodine
Estate Wagon
VW Golf
Corona Mark 1900 Hardtop SL
Jeep
Lancia Fulvia Coupe
Jaguar