My friend just pulled this out of a '68 GT350 Hertz car he recently pulled out of a barn.
https://imageshack.com/a/IK8n7/1
These never came in '68s, correct? What is it then? Looks like a '67 style center, and seems to be dated 1/16/68(maybe). Perhaps out of an AMC?
That's an AMC wheel
No space savers in 1968 Shelbys.