Rolex Oyster Perpetual Sea-dweller, born in 1967, is presented before us again. Rolex Oyster Perpetual; Sea-dweller 4000 can dive into 1220 meters depth and applied the latest technology, including Cerachrom, Chromalight material, Parachrom hairspring and Oyster Glidelock. Rolex Sea-Dweller 4000, which was originally designed for professional divers, is fitted with a helium valve which could release helium after emerging from deep sea to protect it from water.
Cal.3135, top chronometer movement
In the new Sea-Dweller 4000 sets a Rolex 3135 automatic winding movement that could display date. Just like other Rolex movement, Rolex 3135 movement passed COSC severe tests. The structure of this movement is similar to other Oyster movements that have amazing performance. The balance wheel is the heart of this movement, so the hairspring is made of the Parachrom hairspring that is made of alloy of niobium and zirconium, thus this movement is immune from magnetism, and keeps a stable performance even under a high temperature and 10 times stronger than the normal hairspring. The case of Oyster Perpetual Sea-Dweller 4000 is made of 904L stainless steel, and its diameter reaches 40 mm. Cal.3135 automatic movement provide 48 hours of energy reserve. Among the normal watches, such a energy reserve appears to be a little bit short.
Extensive Security Buckle
The bracelet of Sea-Dweller 4000 is a Oyster security clasp that could prevent accident opening and it can extend, so you won’t feel tight even though you wear the thick diving suite. The extendable links can extend an extra 26mm and every piece of it can extend 2mm gradually. Without any tools, you can manipulate it. With such a secure gadget, you do not need to worry about falling off.
Henri Germain Delauze said: When diving, time is crucial. So, having accurate, solid and reliable wrist watch is indispensable. And that is the Rolex Oyster Perpetual Sea-dweller 4000.