Interesting electric cowl lights and aftermarket demountables.
It looks to me as if the photo has been retouched. The shape of the rear door is not right and the beading of both doors is too even to be reflection. I thought maybe a pin stripe at first.
Very common in those days to fill in details in 'muddy' areas of the neg. The whole side of the car has been 'photoshopped', including the running board apron.
I can see the ad in a used car show room now..."Only driven on Sundays by a little old man."
Looks like they added a lot of pin stripe outlines to the car.
Nice set of accessory electric side lamps, side view mirror & demountables !