This Illinois key wind watch belonged to my grandfather. It does not work. The gold-filed case only has two markings on the inside of the cover, the initials G.W.L. and the number 12351. There is an engraved inscription on the inner back cover, “presented to… by his employees Jan 1st, 1872." However, the movement serial number 325722 indicates that it was made in the early 1880’s so the case is about 10 years older than the movement. That makes no sense to me but I guess it happens. I know little about pocket watches. What can you tell me about this watch (and case)? Was it a common model? Is it worth repairing?