A great find! It never fails to amaze me where ACs were sold in that period and earlier, and that they keep turning up!
Further to Tom's description above, the AC Two-Litre - based models included a Cabriolet version of the Drophead. This had cant rails over the doors, rear side windows and a different hood. It is not known how many of this model were made, there being no cars recorded as such in the Factory Ledger.
The Cabriolet in the period photographs, below, is a very early example of the Two-Litre, having completely divided windscreens and a chrome embellishment running across the scuttle and up the divide.
From the photographs on e-bay, the Drophead in New York has white-on-black instruments and no sidelight pintles. My parent's 1949 saloon - not identified but possibly L1085 - had both. Also, the windscreen wipers were controlled by a large black knob on the centre-top of the dashboard. Does anyone know when these features were changed?
The full range of AC Two-Litre based cars were described in the ACtion Archives of May, June and July 2017. These included a few 'woodie' estate cars and, in Denmark, a couple of 7-seater taxis!
John