I would say google Omega ladymatic and see what you can find. If you read the link I provided, you'll know what the experts need to know to assist you. As far as I know, @ulackfocus, with his magical squirrel powers, is the only clairvoyant on the board.
Take your watch to a watchmaker, and ask them to open the watch case for you. On the watch movement you will find a serial number that will help you to date the watch. There are online references that will match a range of serial numbers to a production year. An example of what to look for is here, circled in yellow: and here:
Hint: Buy vintage. There are lots of these out there, in good condition. And cheap. Ask @Syrte ! https://omegaforums.net/threads/vin...differentiate-the-collections-opinions.41203/ https://omegaforums.net/threads/help-with-ladies-omega-watches.41776
There are plenty of really high quality vintage women's watches at really good prices out there! Not sure if @vintagelady is still around but she's the one who bought a nice Omega Ladymatic. I'm sure it would be easy to find if that's what you're into. If she prefers somewhat more modern, quartz and couture, you can find a variety of pre-owned 25mm watches by Hermes / Cartier / Chanel /Bulgari / Tiffany etc sold by japanese sellers on Ebay.