This is Chassis Number 13335. A very interesting car historically. It was exported to Australia in 1926 for use as a demonstrator. It was supplied new with aluminium cylinder head, high compression pistons and three carburettors (but it is not however an S F Edge Special as recorded in the Vintage Register - this car being a high-performance 2/3 seater). The photo shows the owner at the time, Cameron Millar, I believe.
This AC would have been a flyer in its day, a ‘wolf in sheep’s clothing’, with a top speed in excess of 75 mph and, dependent on axle ratio, possibly more than 80 mph.
The car came back to the UK, was registered as SV 4587, and was sold by Bonhams in England December 1996 (again the model type was described incorrectly). Since then, it went to ground for many years, the DVLA showing it had not been taxed, nor recorded for historic exemption, between 2000-2018 but, there is good news in that it is now taxed for the road so hopefully we shall see this very interesting car soon.