Thanks Jack, had no ideal about that crazy tax system! I have always wondered exactly what lights were 'stock' on early Panteras, too, but understand the question is probably moot.
That said, I'd be happy now determining simply what type of headlight was used on the earliest cars in Europe. My guess (after reading all relevant Wikipidea info a few times) is that production cars probably got H4s in Europe. Cars that came to the US would have been fitted here with standard sealed beams, since that was the only legal option. In either case the wiring harness was the same (see attached stock Pantera part; wires are 'Cavis' brand).
Apparently the removeable, 2-filament (high/low) H4 bulbs became available in 1971. The earlier H1s, H2s, and H3s were all single filament bulbs. I haven't determined what 'normal' 7" Euro headlights were prior to 1971 and the advent of the H4. Perhaps the 1970 prototype Pantera had US-type sealed beams??
In the 70s my Dad drove a euro spec 1965 Peugeot 505 with 'single' 7" lights - - so by no means was this an uncommon setup. Yes I should have paid more attention to lights back then
