This is an 'open forum', read by members and non-members alike so there are many who have not seen or read the archive from four years ago.
My French remains at schoolboy level but doesn't the sales description (link above) say this car was 'assembled' in 1928/9 and that 'thirty' were built from parts? (= different to above)
I cannot see the AC 'new management' at the time selling an old model with their new-style radiator (which had yet to be seen by the public, on the new and first ‘Hurlock’ model) so I'm thinking (1) the car is later than 1931 (maybe 1932) or (2) it has been further modified, after 1931, with later parts (like the radiator).
It questions the date of production and registration of this car - the advert says one thing, the ACOC another, and I'm even suggesting a third alternative. This only adds to my view that this car is far from true vintage and both period and provenance, of course, are important with desirability and pricing.
If the ACtion article is accurate and answers the above I would appreciate a short summary.
Thanks