Rolex Submariner Date (116610LN) is waterproof down to 300 metres / 1,000 feet is an Officially certified Swiss Chronometer (COCS).
For $8,500 you get a 40mm wide steel case that is not only made from a very high-grade steel, but is also among the best steel cases I have ever seen. Rolex is famous for that.
With a Submariner you get an in-house made automatic movement with a simple, yet durable self-winding mechanism.
The hands and hour indicators are in 18k white gold, and the rotating diver’s bezel has a very sophisticated black ceramic insert that is quite scratch resistant.
Rolex is famous for their high-quality comfortable bracelets. The newest Submariners have special Oysterlock ratcheting safety clasps which offer a very precise fit for optimal comfort.