Underwood Watch Winder

[JustinK]

I picked up this watch winder at a pawn shop today and can't find any directions online on how to use it. I was not really in the market for a winder but I could not pass on it. Does anyone know if you can program these or how they work. The only controls I see are a toggle which appears to just turn the individual winders on and off. The model is Acorn if that means anything to anyone. Thanks!