jcb,
According to Bill Utley's book on early flashlights in general and Eveready in particular, your nickel(satin finish) or chrome plated (shiny finish) "Serrated-Oval Switch" flashlight is Eveready Model # 250, which was made from approximately 1934-1941. There were 4 other Serrated-Oval Switch models, a 2-D cell with a small flat lens, a 3-D with a small flat lens, a 3-D with a large flat lens, and a 5-D with a large flat lens. Looks like you got a good one with no dents and just minor wear on the "high spots". It's a keeper!
Kirk