Based on the default GT40 steering wheel, all credits to the original author!
I've increased the resolution and made the entire steering wheel a little brighter, so that it fits harmoniously into the cockpit.
The other changes are the shape of the spokes and the steering hub.
I know it looks not as spectacular as the default one, which is a Racetech Design Ltd. steering wheel(a british company, which didn't exist in 1967), but it's historically more correct.
Again it was very difficult to get historical trustfully pics.