An automatic helium release valve. It is integrated in the watch case spring-loaded one-way valve activated when the difference between the inner and the outside pressure reaches a critical level. This function is useful for commercial divers operating at great depths using diving bells with breathing gas mix inside.
An enhanced hardened 3.5 mm thick mineral K1 crystal
Chronograph function.
Swiss-made tritium tubes mounted vertically of on the dial ring. Such position of tubes provides additionally advanced illumination of the time indication.
Custom leather and silicon straps interchangeable by just one screw driver.
The whole watch set packed into an original VE waterproof and shock-resistant plastic box