Momentum M50 DSS Large Black Sapphire glas Discover what makes the all-new Momentum� M50-DSS out of the ordinary. * Solid 316L stainless steel case * 500M / 1650FT Water-resistance (ISO 2281 compliant) * Ultra hard, sapphire crystal with over-size date magnifier * Superluminous hands and markings * 10 Year Battery Life * 6 Year Warranty