The MWC "Depthmaster" Military Diver range represents MWC's latest heavy-duty models, designed for extreme conditions. These watches are exceptionally robust, featuring a sapphire crystal and 100ATM water resistance, making them suitable for mixed-gas diving at extreme depths. They include a 24mm strap (wider than the standard 20mm found on most military diver watches) and a non-scratch ceramic bezel, which is easier to handle in extreme cold. Specifically engineered for professional divers, the Depthmaster is built to endure the most demanding environments.
Key Features
Helium Escape Valve
All MWC 100ATM models are equipped with a helium escape valve, a critical feature for saturation divers operating in pressurized environments. Helium molecules, due to their small size, can penetrate the watch even when seals are functioning properly. Over time, helium accumulates and creates internal pressure during decompression, potentially causing damage by blowing out the crystal or crown.
The helium escape valve automatically releases trapped helium during decompression while maintaining a one-way seal to prevent external intrusion. This feature is vital for preserving the watch’s functionality and preventing potential injury to the wearer.
Why Helium is an Issue
Helium is widely used in deep-sea mixed-gas diving as it avoids the adverse effects of nitrogen, such as nitrogen narcosis. Divers living in pressurized habitats often breathe an oxygen/helium mix. As they decompress, the helium must be safely expelled from the watch to avoid damage, ensuring the watch remains operational and safe to use.
While recreational divers may not require a helium valve, this feature ensures the 100ATM range is ready for professional use under any conditions.
Unique Features of This Variant
This particular model features a sterile European NATO-pattern dial and a black PVD stainless steel case. Its non-reflective matte black finish is frequently specified in military contracts for covert operations, special forces, and anti-terrorist units. Unlike painted finishes, the PVD process chemically alters the steel at a molecular level, ensuring superior durability even under heavy use.
Additionally, this watch was designed for a military procurement contract that specified the following unique requirements:
High-altitude accuracy: Maintains precision at altitudes up to 12,000m / 40,000ft without compensatory pressurization.
Magnetic resistance: Withstands exposure to magnetic fields up to 4,800 A/m (approximately 60 gauss).
These specifications make this model distinct from other watches in the Depthmaster range, as well as the inclusion of a sterile (unbranded) dial, per the contract’s requirements.
Movement
The Depthmaster is powered by a Swiss Ronda 715li quartz movement with a hacking function for precise synchronization and a 10-year battery life.
Dimensions and Specifications
Movement: Swiss Ronda 715li quartz with hacking function
Battery Life: 10 years
Water Resistance: 100ATM / 3,280ft / 1,000m
Crown: Screw-down
Helium Escape Valve: Yes
Case Dimensions:
Width (including crown): 47mm
Width (excluding crown): 44mm
Thickness: 18mm
Lug-to-lug: 48mm
Crystal: Sapphire with anti-reflective coating
Diameter: 31mm
Bezel: Unidirectional with ceramic insert
Case Material: 316L PVD stainless steel
Strap: 24mm NATO webbing
Weight: 132g
Illumination: Luminova on markers, hands, and bezel
Sapphire Crystal Benefits
The sapphire crystal provides exceptional durability and clarity, making it resistant to scratches and shattering. These qualities make it ideal for military personnel, law enforcement, and outdoor enthusiasts. While sapphire increases the cost of a watch, it far outperforms hardened mineral crystals in terms of durability.
Key Points:
Synthetic sapphire is heat-treated to remove internal stresses, enhancing strength.
Anti-reflective coating improves clarity under all lighting conditions.
Sapphire’s durability makes it suitable for high-end, professional-grade watches.
Over 70% of MWC customers—including military and security personnel—prefer sapphire crystals for their unmatched performance.
The MWC Depthmaster is an expertly crafted timepiece, combining advanced features with military-grade durability to meet the highest professional standards.
