i need help to identify the authenticity and model of my grandmas watch

Btw, if you’re asking whether it’s a Seamaster, Geneve, Ladymatic etc, not all Omega watches in the 60’s were part of a named line. This is likely just a ladies Omega

Hello @frev, welcome to the forum-

This is a very cute and good quality ladies watch.

Its monetary value is relatively low because only few ladies buy vintage watches of that era - but this is a high quality watch, the style indicates 1960s (probably late 1960s), and if you’d like to wear it, it is totally worth servicing and it should be very reliable.

Be very careful in your choice of a professional watchmaker. Do not go to a jewelery store- they will send it to a watchmaker you don’t know.
You can search the forum for recommendations of a watchmaker in your area.

Do not allow the case to be polished, which would damage its integrity, do not allow the dial to be restored or refinished.

Polishing the crystal, on the other hand, will transform the look of the watch.
Do not replace it has an original Omega symbol etched (almost invisibly) in the center.

The mesh bracelet is nice too, if it is Omega (look at clasp symbols), all the better

Finally, old watches are not water tight and if water goes inside through the winder it can damage the watch permanently.

Do not spray perfume or apply hand cream with the watch on your wrist, do not spray water while washing hands, do not wear in rainy weather.

And post pictures after whatever you do with it!

I’m 75% certain he watch is a Ladymatic (self winder).the dial feet are broken off, and the dial has shifted clockwise, hence the date is no longer lining up correctly behind the dial. Be prepared for a large bill to have it serviced. It should have a replacement dial. Looks to me as though it was rode hard and put away wet.

oops- then perhaps I should eat my words about reliability- that would depend whether it’s damaged inside and can be serviced properly — since you say it would probably be expensive.