Hi,
After desperate attempts to find any information about this trailer myself, I would like to ask for your kind help identifying it.
I am even not sure if it is a DAF trailer, though to me it looks very much so, and
DAF manufactured such vehicles around 1936 when the picture was taken.

The pictures source is the
De auto van m’n opa web-site.
At least, I'd like to know the length of the trailer more accurately than can be done from the photo, and see its back layout. The common sense says there is a big double door at the back, alas it gives no details.
Also, I'd greatly appreciate any information about the colors of this Opel Blitz truck and trailer.
I have found
some information about the Jos Visschers company, but not a single color picture of their vehicles or mention of the company colors.
My best guess is that the trailer walls color is natural wood, and the roof is white (or aluminium?). What do you think about the colors of the cabin, stripe across it, and the ads on the trailer walls?
Thank you very much in advance for any, any help or clue, even the smallest hint on where I should look further.
Best wishes,
George