Antique Cotton Dispenser

It has a big spring to push the cotton up. There are no markings or engravings on it anywhere. it is in excellent condition as far as not having any dents or anything, but whatever kind of metal it is has what looks like a silver paint of some kind that is wearing off in several places. to remove the top like if you were putting more cotton in, you have to turn the top slightly to release it from a hook thing (see the photo) is it worth anything? Thanks!

Fair