Porsche 911's produced in 1973 for world delivery outside the United States ( usually referred to as RoW ) were equipped with unique Bosch H4 headlights. It was the first generation of the H4 and they were for that year only.
Bulb Holders: The lights had no city lights as those were in the turn signals which made for a different bulb holder from we are accustomed to seeing.
Deflectors/Shields: The deflectors were riveted, the only year that they were built that way.
These could be a concours differentiator.
We have one set only that we've put together over the past 25 years.