Posted by Kerry
In the 1967 Ferrari yearbook, there are pictures of 2 new 330 GT cars with alloy wheels and curved ear knock-offs. These are pictures of cars in auto shows, so one would think that extra care would have been taken to make sure that they were fitted out correctly at the factory.
So I don't think that one can say the the alloy wheels should be straight ear and wire wheels should have the curved ear ones.
This may be more the case where the mechanic walked over the shelf and grabbed whichever was handiest when it was time to put the wheels on a new car. I am convinced that tool kits were done that way.