I know '68 Shelby Mustang's used Marchal lights up until April of 1968 before switching over to Lucas, and that they were rectangular. I recently acquired some round six inch aftermarket foglamp covers with a Cobra motif on them. They are NOS and look to be from the late '60's/early '70s. They look exactly like the round Marchal covers that come up for sale pretty regularly. My question is were round fog/auxiliary lights ever used routinely on any of the early Shelby cars?
Either way, I like the looks of these things. They may not be worth much, but they look nice in the collection.