The Pro Saturation 300m watch is our newest iteration of our top end diver watch. It features a power reserve indicator and date function. The chapter ring displays minutes and seconds and the each hour indicator is lumed. The bezel is a 120 click bezel that sports an aggressive saw tooth design. All three hands are lumed as well. The Pro Saturation Diver houses the caliber 40N5A which is a 22 jewel self-winding, hand-winding and hacking movement. Additionally, the case and bracelet is fully stainless steel and comes with an additional rubber strap and bracelet changing tool. The case is 45.70mm wide and 16.60mm thick. Lug to lug, its about 54mm. The bracelet features an extendable buckle that enables a perfect fit over a dive suit. About the lack of an escape valve: The Orient Pro Saturation diver is so overbuilt that it does not need an escape valve – it is helium gas-resistant and shock proof. The sapphire crystal with anti-reflective coating is about 5mm thick.