Dan, John and Larry or experts.
I am just a mear student.
From memory these cars all came with Lucas sealed beam headlamps.
Not old enough to know about the intrinsic rules of Lemans which may of mandated a lense. Most race cars had lights covered and as you can guess today original lamps are way changed out as the LeMans replicas I have seen did not have a special lense.
You are ahead of me with F700 as to my knowledge the Lucas sealed beam with circle in center is correct as I know. There are two styles one is directional glass and the other horizontal. The horizontal correct.
Would need to go pull a lenses for #.
Std English lens
Look at this on eBay:
https://www.ebay.com/ulk/itm/222033851969