Hi, my recommendation is stay away from Omega AD with this piece. Its going to cost you an arm and a a leg. A simple cleaning by a local, skilled watchmaker is enough, and I would do that only if you plan to pass it on as a family heirloom and know it might get use. If you are just going to store it, keep it as-is in a safe place.
Value will depend on the material of the watch, if its gold filled there is no value unfortunately, for a ladies gold watch anywhere from 500-800 is what ive seen them go for.
Good luck
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