In Albert's book, on page 93, there is an example of a five pointed star. However the backmark is not the same as yours. Than on page 96, number 69 to 71 are five pointed stars. But again, they don't have your backmark. Tice's book doesn't have much on that particular button. Without a more descriptive backmark, it's almost impossible to tell who made the button, but it still stands as an excellent find, in very good condition.