THE FULL STORY
Before they return to the open air, professional divers heading for the surface after a deep saturation dive must spend time in a decompression chamber, where they breathe a gas mixture containing helium. The tiny molecules of helium, an extremely light and non-volatile gas, infiltrate everywhere in the chamber, also penetrating the watch. During decompression, the helium is unable to escape from the waterproof case quickly enough, creating a pressure differential that could force the crystal out of the watch case. Rolex engineers created a gas escape valve fitted with a spring: it opens when the difference in pressure between the inside and outside of the watch reaches 3 to 5 bars, allowing the helium to escape, thereby protecting the watch.
This particular watch is in pristine condition for its age and appears to be handled with care through its ownership
Year: 1989 - 2009
Material: Stainless steel
Dimensions: 40mm diameter; 17.7mm thickness
Lume: Yes, Superluminova
Caliber: Rolex self-winding caliber 3135
Bracelet/Strap: Rolex folded Oyster 9315 bracelet
Lug Width: 21mm
The bracelet matches the condition of the watch, being in absolutely pristine condition with a tight bracelet and snappy adjustable clasp. There small blemishes on the sapphire crystal but very minimal, case front, case back are in good condition, the bracelet is in excellent condition.