This car measures 4.75″ x 1.75″. The car is made of thin plastic with red plastic wheels. The license plate on the back reads B308. So it is possible the company that produced it had a name that started with B. This is not a Keystone car but it came with a Keystone ferry-boat that I purchased. This can be filled with “fuel” just like a Keystone but has none of the other characteristics. Due to the material this car is from the late 1940’s or 1950’s.
From my private collection.