Rare vintage Omega Genéve gold watch with integrated gold strap

Good morning.
I have this Omega Geneve watch, made of gold with a very fine gold mesh bracelet. It was a marriage proposal gift from my mother to my father in 1975, and I inherited it. I only have the original box it was stored in. It has never been worn in the last 50 years, except to attend a couple of weddings. It works perfectly, although it could do with being taken to a watchmaker to be adjusted and cleaned. It has never been opened or anything like that (as I said, it has been in a box all its life), so I don't know exactly what model it is.

It weighs 87.80 grams.

I am trying to find out exactly what model it is, but I can't. I haven't found any photos of a similar watch with a gold case and such a fine gold mesh bracelet.

Could you help me find out what model it is? And its approximate value today?
Thank you very much.

Thanks, i guess i will have to find a Omega SAT (or will any watchmaker do?) close to my location (no one close to my town, norhwest Spain), to open and find the exact reference/model (as i told you i can't find a single picture of a watch like mine, so i am very intrigued as to what the exact model will be), and also to find out if it's 14k or 18k etc...

Reference number will be on the inside back. With that. Easier to search

I refer to them as old men bling watches

My dad had a no name one made. Wedding band to match

I guess that this what happens with mine. Nationally cased (spain) with the mechanism omega (That's what I've found out in other forums), I will not open it, it works fine and di don't wont to damage it... and i think that the main value is the gold... Thanks for all guys!!

it is certainly a head turner!