MWC Swiss Made 500m (1640ft) Water Resistant Automatic Divers Watch in Black PVD Stainless Steel With Sapphire Crystal, Ceramic Bezel and Helium Valve 20mm Straps Sapphire crystals are heat-treated to

Sapphire crystals are heat-treated to eliminate internal stresses and then coated with dual layers of anti-reflective coating

they upgraded to an all-metal construction

Exceptional DurabilityThe sapphire crystal and ceramic bezel provide outstanding resistance to impact and scratching

and those who lead active outdoor lifestyles

MWC Swiss Made 500m (1640ft) Water Resistant Automatic Divers Watch in Black PVD Stainless Steel With Sapphire Crystal, Ceramic Bezel and Helium Valve 20mm Straps Sapphire crystals are heat-treated toSKU Code: CH 500M PVD BL The MWC 500m Water Resistant Divers Watch with Helium Escape Valve is part of MWC's elite range, offering superior durability and functionality for professional divers and challenging environments. This model, finished in covert non reflective PVD steel, features an impact resistant sapphire crystal and a scratch resistant ceramic bezel. It is suitable for all settings, from office environments to extreme outdoor activities.