If I recall it right, it is from 1934 and the design of the body was done by Freiherr von Koenig-Fachsenfeld for an Italian driver. I'm not sure about the coachbuilder, perhaps Vetter.
I have a contemporary magazine snippet hopefully on my computer at home. (Unfortunately my brand new laptop has been denying to work since Sunday, so I hope I can recover that photo from my old laptop which has hard drive problems.
)