That's the one and I cannot have seen it in that form after all.
The Mike Savory website says:
Built and race-prepared by the factory in 1935, this car (PA-1667) is one of three MG PAs entered by Captain George Eyston for Le Mans, where his "all-girl" team won their class. In July 1935, the three cars were converted to trials' specification for the "Three Musketeers" team. This conversion included increasing the engine size from 847cc to the PB capacity of 939cc and changing the Le Mans livery of British Racing Green to MG's contemporary racing colors of cream and brown, more commonly known as "Cream and Crackers."
Two months later the cars' specifications were slightly modified for high-speed trails at Brooklands. In October the factory sold the three MGs with American Miles Collier becoming the first private owner of PA-1667. Before the car was shipped stateside, Collier instructed the factory's competition department to make a few modifications, including the installment of a Marshall supercharger of the type originally designed for pressurizing aircraft cabins.
Aside from the fact that the team cars were "Cream Crackers" not "Cream and Crackers" this account shows (together with the large brake drums) that although it was a PA to begin with, it is a PB in all that matters save chassis number!
Also I'd say that Marshall blowers were not much used for aeroplane pressurisation in 1935. . . .
This is how it looked as it left England, supercharger between dumb irons, PB brakes but MG body.
