I don't want to contradict John (CompClassics) as he's correct, the photos he posted are of an "AC 289 Sports" but it's a later coil spring car.
For historical reference on an open forum though, this is a "COX" car I photographed in San Diego a couple years ago. Stupidly, I didn't get the chassis number though!
Anyway, note it's a rack and pinion car, 6" Well-Laced Dunlop wheels, Smiths gauges and front Cobra badge.
Larry
