Ertl #19368 Chevrolet Fuel Tank Truck in 1:43 scale.
This model appears to be a 1955 or 1956 Chevy truck that is used for delivery of heating oil. The model has dual rear wheels and very nice painted details. As a 1:43 scale model it could be used in a model railroad 1950's foreground scene.
Prototype photos of typical 1955/56 Chevy trucks with very similar appearance are shown: