I just won this Illinois pocket watch on Ebay:
Vintage ILLINOIS Pocket Watch 1 3/4" Diameter / Works | eBay
Paid slightly less than $39.00 for it, shipping included. The seller says she does not know how to remove the case back, but it is apparently pendant-set, and still works. Hopefully I will have it by the end of the week and I can figure out how to get the back off so I can see what sort of movement is in it.