Dive watches
The reason for buying a dive watch is the obvious. The watch is for keeping time during your dive. You can get a dive watch made by Citizen Eco-Drive or Seiko. The 200m professional diver by Citizen Eco-Drive comes from their line of professional dive watches. It remains water resistant at up to 200meters.
If you want to wear more luxury on your arm while diving you should invest in Rolex dive watches. If you by an Oyster from Rolex it will be water resistant for up to 300 meters.