My pal has a '64 Impala SS with air that has the ash tray under the dash. We always thought they were original equipment though. LeoI believe the accessory ashtray which could be ordered with the car and or dealer installed under the dash may have been used with air conditioned cars.These were interior colored ash trays as to dash color.The air condition outlet was directly above the normal ashtray ,thus this could cause ashes being blown all over the car when using the original ashtray with the air on..I have 1 at home that is red,which came with a bunch of 63-64 parts that I bought years ago from 2 totaled cars..Those ash trays were not vacuum operated,believe it mounts directly under the dash by radio and original ashtray. .