This is the Momentum M50 Mark II Dive Watch with Scratchproof Sapphire Crystal Display Features: Inspired by Momentum&';s police department private label program Rugged features make this watch nearly indestructible Available with new LUMINOUS DIAL option or Black Dial Solid steel case 500M water-resistance Standard ultra hard sapphire crystal 6-10 year battery life Momentum M50 has been inspired by Momentum&';s police department private label program. The rugged features make this watch nearly indestructible. Now with a new LUMINOUS DIAL option. Solid steel case, 500M water-resistance, standard ultra hard sapphire crystal and a 6-10 year battery life.