It occured to me while attending the Iola Carshow in Wisconsin that many 63/64 chevys with factory a/c have an accessory ashtray mounted under the dash center.   Only on air cars

Then i discovered that the 1965 impalas with factory air have a built in dual ashtrays on either side of the heat controls.  They are only on A/C cars, regardless of convert, HT, caprice, Impala.  Even the Factory assembly manual shows the second ashtray for A/C cars only

Anyone know that the theory was behind this dual ashtrays for A/C cars was???  What was GM thinking, and it seams to disappear come 1967ish.

Here is a Loaded up non-ac dash with one tray,  vs a Factory AC dash with 2.  No, niether car is a caprice, the owner added the woodgrain.

Hmmm,   good idea.   But i wonder if that was GMs intended thoughts too.

the 63/64 impalas had the vent there too, with the factory ashtray to the passenger side of the vent,  the add-on accessory tray was to the left of center,  so this is entirely possible Ian.

Anyone else have any thoughts??????