Sealed beam, headlamp unit 4-1/2"

12V 30/30W. USA sealed beam style. Mandatory in the U.S. from 1939 to 1984 in either regular or halogen versions since it was forbidden to ride / drive any vehicle on a public road with replaceable light bulbs. In 1984 H-4 was finally approved and introduced. In the sealed beam the light bulb is sealed into the unit and cannot be removed. These are non EU approved period correct classics!