MWC Heavy Duty 300m Military Divers Watch in Stainless Steel Case (Quartz) with Sapphire Crystal and Ceramic Bezel (Solid Bar Version)

• Movement: Ronda 715li with hacking function and 10 Year Battery Life
• Water Resistance: 300m / 1000ft 
• Crown: Screw Down Locking
• Width Inc Crown: 48mm
• Thickness: 15mm
• Weight: 120g
• Crystal Diameter: 31mm
• Crystal Type: Shatter and Scratch Resistant Sapphire with Anti Reflective Coating.*
• Lug to Lug: 51mm 
• Case: 316L Stainless Steel
• Illumination: Luminova on markers and hands
• Strap: 24mm NATO Webbing Strap (1 x Black and 1 x Grey)
• Strap Bars: Solid Military Specification Fixed Bars

* A lot of people ask us what are the benefits of sapphire crystal over a standard mineral crystal? The answer is that synthetic sapphire is by far the best material for watch crystals because it is very strong and also shatter and scratch-resistant, these characteristics make it very appealing to military and security personnel, police officers and people who lead active outdoor lifestyles, these groups account for over 70% of our customers. To get things into perspective we find that when clients have accidents with watches resulting in a cracked crystal over 90% are usually watches with mineral glass crystals, even factoring in that we use hardened mineral crystals they still do not come close to sapphire for durability under adverse conditions. The reason that sapphire crystals are so strong is that after the sapphire glass is manufactured it is also heat-treated to remove its internal stresses—which can cause weakness—it is then made into the watch crystals and two layers of anti-reflective coating are applied, interestingly sapphire crystal is now used on the latest iPhone. Of course, sapphire crystal comes at a price hence you find that it’s normally only fitted to higher-end watches.