MWC 21 Jewel 300m Automatic Military Divers Watch with Sapphire Crystal and Ceramic Bezel on a NATO Webbing Strap
Product Code: SUB/SS/B/A/MY
This watch is one of MWC’s current military specification divers’ models, built to withstand the toughest conditions. It features a robust stainless steel case, an anti-reflective sapphire crystal, and a scratch-resistant ceramic bezel. The automatic (self-winding) 21-jewel Cal. 8215 movement offers a 40-hour power reserve, delivering outstanding reliability and exceptional value for a timepiece of this specification.
The watch measures 45 mm including the crown (40 mm excluding) and is supplied with two 20 mm NATO straps — one in black and one in grey.
Dimensions and Specification
- Water Resistance: 300 m / 1000 ft
- Movement: 21-Jewel Cal. 8215 Automatic, 40-hour reserve
- Screw-down Crown
- Screw Caseback
- Scratch-Resistant Ceramic Bezel
- Sapphire Crystal *
- Width (incl. Crown): 45 mm
- Width (excl. Crown): 40 mm
- Thickness: 15 mm
- Crystal Diameter: 31 mm
- Lug-to-Lug: 49 mm
- Weight: 89.5 g
- Supplied with 2 × 20 mm NATO Webbing Straps (Black & Grey)
Why Sapphire Crystal?
Many customers ask about the advantages of sapphire crystal compared to standard mineral glass. The answer is simple — synthetic sapphire is vastly superior. It’s exceptionally strong, highly scratch-resistant, and extremely difficult to shatter, making it ideal for military, security, and law-enforcement use, as well as for outdoor enthusiasts and anyone with an active lifestyle.
Over 70% of our customers fall into these groups, and our experience shows that when a crystal breaks, over 90% of the time it’s a mineral glass — even when hardened. Sapphire, on the other hand, can endure far greater stress and impact.
This strength comes from a precise manufacturing process: once formed, sapphire glass is heat-treated to eliminate internal stresses and then coated with two layers of anti-reflective material. This same sapphire technology is now used on the latest iPhones.
While sapphire does add cost, it’s an investment in durability and clarity that’s well worth it — one reason it’s found only on higher-end timepieces.


























