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This model is the Toy Products/Robin Hood #6 Flat Truck in red and pale green.
The model is a two-piece cast metal body with molded headlights, grille, front and rear bumpers, windows, doors and wheel arches. The rear tray is the second cast component.
There is no base plate and the body has no markings on the underside, nor on the flat rear tray, to identify the manufacturer or country of origin.
All wheels are one-piece, solid metal that are pressure fitted into the body casting at the front in such a manner they sit between a flat pillar, coming from the under side of the wheel arch, and the body casting itself, and, at the rear, they sit inside the rear wheel guard itself. The wheels are shaped to include a small "pin" either side of the wheel that, under pressure, push into corresponding holes in the casting and are thereby held in place. This model is missing one front wheel.
This model was issued in the 1940s.