The 1949 Aladdin model B Nashville Treasure lamp was made to commemorate Aladdin's move the Nashville. This lamp is a factory hybrid in that it is made of a Treasure bowl mated to a model 12 foot.
1949 was a year of many changes. Aladdin headquarters moved to Nashville, the labeling on the model B burner changed from "Chicago" to Nashville", treaded inserts for the burner in the top of the fonts were replaced with a single formed thread and the fonts were painted instead of plated. This commemorative lamp is a fine example of those changes.
Aladdin made an electric version of this lamp from 1949 through 1953. The electric version, catalog M-251, used a polished brass Nashville Treasure font with an electric burner. The electric cord exited the lamp through a slot in the base. These lamps are a lot more common than the kerosene Nashville Treasure and some people have created their own Nashville Treasure lamp by placing a bronze plated Nashville B burner on a M-251 font that has been painted brown. Genuine Nashville Treasure lamps and good fakes have the identical "Bronzetone" paint as the 1949 - 1953 bronze font lamps.