Please, please don't do anything until we've had a chance to look at your finds and then let the experts share their knowledge.
You have a quality watch that will last your lifetime and be a nice heirloom as long as you properly maintain it.
Keep it completely all-original !!!! No polishing or dial cleaning at this point and don't wind it!
Perhaps start looking around for a quality, experienced watchmaker.
While you are searching for the other watches, keep an eye out for the boxes or papers.
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