Early 1900's Girl's bedroom set - Northern Furniture Company, Sheboygan., WI

This furniture set was my wife's grand mother's It was purchased in early 1900 and delivered to their home in Grand Forks North Dakota. All the furniture is well-worn and there is some damage (broken spindles). The paint is peeling in some places. It is clear that the furniture is well made, and I am trying to determine if there is a financial value as well as sentimental, that would justify restoring. The set includes the following: Full sized bed with head and footboards, dresser, dressing table, night stand, and chair. If anyone can shed additional light on the manufacturer and potential value, it would be greatly appreciated.