Hi. I think a few more photos of the 11, and 2 lugs from the top of the watch will help. Dials fine. But as mentioned above 11 lug looks rounded which is strange given the 7 lug looks perfect. Could be the angle of the photo but the 2 lug while having sharp contours looks a bit wobbly. Could some metal work have been done to the case to sharpen it up? These models are so much valuable that completely fake cases are common. The experts needs to chime in on that. You can add more pics in the same post. No need to make a new one.
The crown is a modern replacement of course ( no biggie) and so is the buckle. Need a photo of the underside of the buckle to make sure it is genuine omega modern buckle.