Check out this video of DEEP BLUE Watches successfully testing their DEPTHMASTER 3000M dive watch with the Roxer RXF 500 up to 375bar, the equivalent or 3750 meters of water-resistance. This is the exact same equipment from ROXER of La Chaux-de-Fonds, Switzerland that was used by Hublot to TEST the Oceanographic 4000. It is also used by other leading watch brands for testing their watches' water-resistance . . .
Follow the link HERE to see more of the Depthmaster 3000m.