Translate the following sentences into symbolic form using uppercase letters and logical operators.
1. Either Breitling has a diamond model and Rado advertises a calendar watch or Tissot has luminous hands.
2. If Movado offers a blue dial, then neither Fossil nor Nautica promotes a titanium case.
3. Gucci features stainless steel; also, Fossil is water resistant given that Cartier offers a stop watch.
4. Movado and Nautica offer a black dial if and only if Piaget has a gold watch.
5. Cartier's offering a stop watch implies that Seiko has leather bands, provided that both Rado advertises a calendar model and Tissot has luminous hands.
6. Piaget and Nautica do not have a sapphire watch unless Breitling's having a diamond watch is a sufficient and necessary condition for either Cartier's offering multiple dials or Gucci's selling a self-winder.
7. Seiko has a quartz watch if and only if either Movado does not offer a silver dial or Rado does not have a calendar watch; however, Tissot has luminous hands only if both Fossil is water resistant and Rado has a calendar model.