Vintage Ladies - Omega De Ville Tank

Hi, this watch was given to my mother in law in the 1970s (already used) and she has kept it in storage since. The movement still runs.

I’d like to know if it would make financial sense to restore it, given the watch’s current status, potential value and the likely restoration/service cost.

Thank you in advance!

PS: apologies for the low-quality pictures, but the watch is tiny and my phone’s camera is not great.

Another picture.

I should have also mentioned that it has a mechanic movement, but I haven’t had it opened yet.