Heh. Got a chuckle out of this article:
Awesome or Atrocious? 4 Bizarre Car Accessories that Used to Be Cool
The four items in question are of varying relevance - some, like the pop-up headlights, were nearly ubiquitous in the sports car genre for many years, while others - the third headlight - are very specific. The other two items are in-dash record players (and you thought early CD players skipped a lot!) and hidden gas filler caps - not as rare as the third headlight but not as common as the pop-up headlights.
I've owned one car with one of these features - my 1983 Cadillac had the gas filler behind the license plate, which had a hinge on the bottom allowing it to fold down for filling. My mom had a Buick Regal in the 1970s that also had the gas filler in this location, so I associate it mostly with the land barges of the 1970s. I've never seen a record player in a car, but I do remember in-dash 8-track players (and their cassette adapters for the early 1980s!). Pop-up headlights, pretty much everyone remembers - they were on Corvettes as late as 2004, so just about everyone gets something on this list...
What other bizarre accessories can you think of?
That is all.