US 2 1/2 Ton Personnel Truck Z-115
Roco made two different cabs and two different canopies.
The one with the closed door, angular fenders is the Post-WWII era cab, the one with the rounded fenders and open door is the WWII era cab.
The round canopy is the WWII era and the flat top canopy is the Post-WWII era canopy.
The cabs were mixed and matched with all the early Roco 2 1/2 ton truck sets. And the cargo truck itself was sold as the Z-115 / Z-116 and could have either version in the package.