If it's 1934 it
has to be Model 355D
My apologies for the confusion. The source (with a connection to the coachbuilder) states that the car was delivered to the client in December 1934, but identifies it as a Series 353. I believe both of these to be true, which means this was a 1930 Series 353 rebodied in 1934. You had all of the pieces to begin with, so the point is yours!