Hi Robbie
They were on the car when I purchased it and apparently were installed in it's early years. I saw or read somewhere they were installed in lieu of the square chrome by some dealers/owners. My first Pantera had the chrome ones.
Apparently they were used on some Mercury Cougars and I'm not sure but seems I saw them on Summit Racing site like the square chrome ones.
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.