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Title asks it all. I know they didn’t all come along at the same time, of course, but googling doesn’t bring up much that looks reliable.
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Well, just from my own experience, I had a '62 Cadillac Limousine that was factory equipped with AM/FM radio with Signal Seeker…you hit the seek button and the needle would move across the dial and tune in on a strong signal. It had power windows, automatic transmission, power brakes and steering and A/C. The A/C had separate temperature and blower controls for the back seat. There was a power glass partition that went up and down behind the driver’s seat, so you could probably have it freezing cold in one part and warm in the other part. There was a separate heater core for the back seat that was mounted underneath the car, but only one A/C compressor (made by Frigidaire for GM, I believe) under the hood.
I guess it depended on how much money you wanted to spend.
I’ve never had anything older than that, so that’s the most info I can give you.
My '65 Mustang had A/C at one time, but I think that was a dealer option. The whole thing bolted on underneath the dashboard. The previous owner had removed the inside unit and the compressor because it didn’t work.
Also, here’s a couple of links from eBay motors. I looked at a bunch of unmolested luxury cars from the 40s and 50s and couldn’t find any with factory air. Scroll down to the interior pictures and you’ll see how the setup was.
'54 Chrysler New Yorker with factory radio, power steering and automatic transmission, no mention of A/C, and I can’t see a compressor in the engine shots.
1949 Chrysler Windsor which has a hole in the dash where the factory radio was at one time. It had semi-automatic transmission, which required a clutch to get it going from a stop. This one didn’t have any A/C, but check out the detailed picture of the fresh air/heater control anyway just for kicks.
This 1951 Cadillac has automatic transmission and factory radio, not to mention power seats and power windows.