1957 Chevrolet Bel Air Nomad for sale on BaT Auctions - ending October 4 (Lot #86,302) | Bring a Trailer Color is great. They have kept interior and dash looking stock.
The vents and controls look factory for the era. The setup under the hood is not but it is actually pretty close. I didn't know if you could get factory AC in 1957, the earliest I've personally seen documented factory air is 1958 in these cars (aka on an actually built car, not just the dealer order manuals). I'm pretty sure sometime in the '55-57 era you could get it, definitely not common at all. Car sure looks nice and tasteful, even if I don't care for the wheels.
The '57 brochure mentions that air conditioning is available (next-to last page), but doesn't specifically say that it's factory-installed. No pics or diagrams of the set-up..... http://www.lov2xlr8.no/brochures/chevy/57chvy/57chvy.html
A/C makes driving a classic like this so much more pleasant. If I could afford it you better believe I would drive it.