Assistance with model? How old?

Is it possible to get the caseback taken off and see a picture of the inside of it?

Generally speaking these watches were gold filled (not solid gold) and they are VERY small (its amazing they were able to actually make an automatic that small back then) and as a result the gold weight is very low.

Here's an example of what something like that would go for: http://www.ebay.com.au/itm/OMEGA-LADYMATIC-Ladies-Watch-Vintage-1960s-Warranty-/270743234060

I've seen them go between $250-$600 with the good condition of that one (assuming it runs well) probably putting it on the upper end, but there's really no market for them, unlike vintage Omega sports watches and the mens Constellations, these have not aged well fashion wise (which is all that matters in ladies watches) and as a result there is just no demand. If it means a lot to her, just keep it, because any offer made by a watch dealer will likely be insultingly low.

If it runs wear it, if it doesn't run, then it probably isn't worth spending much overhauling unless for sentimental reasons.

The one possibility with this is that IF the new Omega Ladymatic (Seen below) becomes a big hit, the value of the old models could increase slightly. I wouldn't count on it though.

Happy to be of any assistance. Just don't show her pictures of the new one, it could get expensive for you!

Oh and by the way, they were 1950s 1960s production, and that bracelet does look original, many of them would have fallen apart by now but that one looks pretty good.

If its simple, could just be a mainspring or something, but it could also be much more complicated. If any moisture has gotten in through the crack (or any other way for that matter) you could have corrosion problems inside. These can easily cost $300 for something simple or $500+ for a serious problem, which is more than they're worth. Does it mean a lot to her, or is it just something she'd like to wear again?

No problem man, might be worth getting Omega Bienne to take care of it if its a special watch, they'll get it to look exactly as it did the day it was manufactured, and they're not afraid of vintage watches