I have 2 of these brackets, both in NOS condition. One tagged by ELB, the original manufacturer, and the other tagged by Dietz. Dietz may have bought out ELB. These were marketed as "Undercover Light Bracket" in the 60s and 70s in catalogs by Darley, and Sargent-Sowell. Good option for the lights with weaker magnets, common vinyl roof coverings, and soft top vehicles. The lights were to be permanently mounted to the bracket, hooked over the window, and the window rolled up. There were a good number of height adjustments.