Welcome
The movement photo is pretty bad so really hard for me to see and help ID but others may recognize it none the less.
Case is probably the most interesting part of this watch; Omega signed case w/medallions isnt too common, and I believe it is Silver (.800) as well.
Dial is porcelain so it is fragile and yours has had a fall or three causing the dial to crack and break. No fixing that, live with it or source a replacement (eBay or other) is the only option.