I posted pictures of the 1668E set on Friday here, but didn't think of posting this MARX set. It's probably the most common of the Marx Streamliner Sets.
A neat set that looks cool.
The cars couple together with pins and only have rear wheels. The cars also have different names on them. I know the prewar sets in other colors come with more car names, but I am not sure about these postwar cars.
This is a large motor like used in a steam loco. No headlight, but there is a reverse unit but without an on/off lever. There might be a version with a smaller motor that only has one pair of wheels powered?
I think early sets have only dividers for the track and transformer with the cars in sleeves. The later sets have dividers for each item. This box would have the track in the long slot, the transformer in one square and the locon, wires and transformer cord in the other square.
Box is dated May 1950.