I’ve got a one owner low mileage 1967 442 that I’m restoring. This is the cap that was on the radiator. I’ve done some looking and can’t find any evidence that this is the right cap, maybe it was switched? Can someone plz inform me if this is indeed wrong and what the correct cap for a 67 442 should look like? Was the RC15 the only one used?

 

These are correct

 

Thanks