Seen this in 'for sale' as a Caravelle part and didn't want to clog that up with questions.
So, what's the 4th control aspect for?
Air con?
Additional vents in footwell?
Yes, I'm bored, relaxing, and curious

'89 2.1 with Pierburg-esq carb.
ABN/ABM 5sp gearbox. ( I forget which, and now it is under a protective layer! )
“Some people die at 25 years old, and are buried at 75 yrs old” ~ Benjamin Franklin.