I have an oil dispenser that measures out a quart at a time by rotating the lever. It has a Mobile artic oil sign on front and has brass and cast fittings. I am guessing that this is from the fifties at the latest. Tank and hardware are in near perfect condition. Unit has been repainted (low quality rattle can), but paint seems to remove easily. I have not touched unit because I am not a restorer. I can provide pictures easily. What is something like this worth? Got it from grandpa, and he has had numerouse strokes. I have no history on this unit.