Mr John Scarce posted this photo on the MG TD Enthusiasts Facebook site from 50 years ago. I asked if it survives and he replied with the registration number KG3660 so I am guessing he may be looking for the car? Is it a known survivor?
George, I vaguely knew George Lucking at the Black Horse natter at Nuthurst in the '60s. As I recall he had quite a nice blue swept wing J2 and his family ran Luckings Theatrical Movers, so he may be contactable via the company: https://www.luckings.co.uk/
I too was curious about the supercharger. Matthew was kind enough to put the car's owner in touch. It is a Cozette. Apparently both Centric and Cozette superchargers are now available new.
Those super chargers look like the sort of item that if you have to ask the price you can’t afford it!
But going back to the original query, George Eagle is able to tell us that KG 3660 is J4374 which was a late swept wing car (the last one was J4432). But I wonder if this is the car in the photograph? Obviously the cycle wings are not of the original M.G. pattern and they could easily have been substituted at any time. However, the fuel tank looks to be the early pattern flat backed one and the wiper motor is centrally mounted whereas the swept wing cars had the wiper motor in front of the passenger. Of course any or all of these changes could have been made in the thirty odd years between the car leaving the factory in February 1934 and the photograph being taken but on the face of it, it doesn’t look like it was a late model swept wing car.