I'm helping with an estate sale by putting some items on ebay for the family [We're in rural Maine and there's not a lot of local demand for some items.] and I have a pendant lady's watch that I can not identify. It was found with a Waltham Openface Lady's Wrist Watch, pre-1920, and a Hamilton Openface Lady's Watch - pendant model. circa 1922. Photos are below. The face has no manufacturer's or brand marking whatsoever. The inside of the case only says 'guaranteed 20 years' with a 'NE' inside a heart. The movement has serial 22737 followed by gothic lettering I'm having trouble with. As best I can make out, it might be NEW Co or NGW Co - neither of which help me figure this out. It also has USA engraved on the plate which should narrow it down a little bit.
Any help or guidance will be greatly appreciated. Many thanks in advance.