Quote Originally Posted by 66S View Post
This is the 65-67 Euro headlight with yellow bulb for France.
One might note that the part numbers for the French and "Rest of Europe" headlight assemblies are the same (901.631.101.00)--only the bulb changed. French cars got a yellow bulb.

Nowadays, you can also find H4 bulbs with a P45t base which will fit those headlights and provide more light. I'm not sure you can get yellow H4 P45t bulbs, though.