Our legendary M50 offers industry leading reliability, with 500M rating, scratch-proof sapphire crystal, and ultra-legible dial all in a matte black 316L stainless steel case. The M50 is trusted by military and tactical teams across North America to deliver rock-solid performance in any conditions. With our LongLife battery system (8-10 years), you can typically strap it on and forget about if for the next decade!