Divco trucks were first produced in 1926 by the Detroit Industrial Vehicle Company. In 1938, they introduced the Model U which featured the familiar sloping nose, folding doors and stand and stand-up driving position. The U was Divco's most popular offering and continued with only minor design changes until the firm went out of business in 1986. It rode on a 100 inch wheelbase for making tight turns and was powered by a 4-cylinder Continental engine. Top speed was 46 mph. Unit sales peaked in 1948.
Divco became a victim of a changing culture. Its best sales year was 1948, when 6,385 of the little trucks rolled out of the Warren, Michigan plant. No wonder they made so many: in 1948, per capita consumption of dairy products was 400 pounds per year and 80% of all milk produced was home-delivered. By the mid-1960s, home delivery had dropped to under 30% of all milk sales and per-capita consumption of dairy products had dropped to 300 pounds per year. Home delivery of bread and other bakery products had fallen by a similar percentage. The age of the supermarket doomed these little purpose-built trucks. By the time Divco went under, annual per-capita consumption of dairy products was down to 220 pounds. There is a club for Divco enthusiasts.
I have a 1:43 scale model of a 'Dugan's Bakery' Divco placed on my O-gauge train layout (go here and scroll down to the 'White Castle' photo). When I was growing up in Philadelphia, Dugan's delivered bread and baked goods to our home in one of their black and cream Divco Model U's. The company's slogan was 'Bakers for the home since 1878'.