Identifying a watch, especially a ladies model, may require perusing the catalogs that Hamilton distributed to retailers every year. The main attributes to consider are the movement inside (the movement will date the model), the case material (solid gold, gold filled, etc.), the shape of the crystal (round, etc), and, of course, the overall details of the case and dial. There are many similar models so understanding these features is important.
If you want to find part numbers for various Hamilton parts check out the Hamilton Parts Manual