Again, Tom, George, and Jim’s book provided an answer: “Metal is most commonly used with steel and now aluminum leading the way. Tin, copper and brass were used as well. Early license plates issued in many states were porcelain covered steel, but these fell out of use by the early 1920s. However, Delaware, in its general issue in 1942, issued porcelain plates. Delaware has not made a complete reissue of its plates since then, and some of these porcelain plates remain in use today.” Next week we’ll talk about other nonmetal license plate composition….stay tuned!