Case without crown 1.73 diam.
Fits wrists 5-8 1/2 in circumference.) The crown screws down and locks with a double O-ring that provides water resistance to 660', while a scratch-resistant, anti-reflective crystal protects its precise quartz movement. Army Special Forces and Navy SEALs, this watch is encased in a solid block of 316L stainless steel with a rubber strap that endures rain, knocks, and sweat.