1. That gray is unusual. The marble looks sort of Akro, but not with the gray, unless gray was a color that showed up in Akro's exports to Europe, which could very well be. Vitro is another good choice, though again I don't recognize the color for Vitro. But again, I recognize that this marble is in Europe, which could shake things up as far as ID's go.
2. Akro or Vitro. The LONG seams point away from Asia.
3. Maybe Marble King. (All-Reds have one red patch but a different color on the other end.)