What is this steering wheel?

72 Demon,

The 64-66 did have a wood wheel with closed spokes and they used a metal center that snapped in.

74 Sport,

It looks like you have the 64-66 horn button and mount, it should have a part number on that starts with a 25XXXXX.

There was one other steering wheel in 67 that was similar to the 68-69 A and 68-70 B (clarification from my above post) but it was recalled. Some of you may have seen them over the years for sale on eBay for crazy money, like the SBP magnesium wheels.