Identification enquiry

Help please to identify this Omega timepiece please? It's a handwind watch. Thanks

It might be helpful if you tell us why you want to know, what your research has indicated and what knowledge gaps remain. Otherwise, it’s like someone asking to identify this bus

It’s actually a greyhound bus

what are the dimensions?
Of the watch that is, not the bus.

Thanks.

I'd like to know a but more because I really don't know much about these watches (other than I like the understated look and the quality.) I partly like to find out more information just because it's interesting. I've tried to do some research but it seems there's lots of similar looking possibilities (variations on hands, what's written on the face for example) so I can't really work it out. It is a watch that's been knocking about the old family home for a while, I tried to ask my dad about it, he used to love talking about his watches, but he's less able to remember the details these days. He was talking about a Zennith(?) when I brought it up, which is one I think he must have had long while back. Not really relevant to this one. Anyway, I'm sorry if I'm wasting anyone's time, probably it's not worth worrying about but I had a bit of free time so thought I'd ask on the off-chance. All the best