George Drescher demonstrating the new cabinettry in a Dodge salesman's car at the 21st Automotive Service Industries Show in Chicago, 1941

Something you might not be aware of, is that with the advent of big inexpensive cars, door to door, and city to city salesman were in big demand, and instead of using trucks, the car makers were building car with no back seats and huge trunks for lots of storage, called a Business Coupe, and though this is an aftermarket cabinetry far nicer than any salesman was going to pay for, it's the eye candy that pulls people into the convention booth so the sales guy can sell anything else his company makes