Two data points from 8MA1010 (Sep 1969), first pic is from brake reservoir cover. I assume this was on US cars only (like the rear cabin window sticker)...
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.