If I recall the rings are typical of the time.
Try a junkyard to see if one from the sixties or rely seventies looks the same.
Dick Ruzzin
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.