Stuhrling Original Men&#39;s 160A.3346K59 Special Reserve Apocalypse Skeleton Automatic Rubber Strap Watch Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Reliable automatic-self-wind movement 20 jewels Hand engraved Skeleton movement and rotor accented with blued steeled screws Krysterna scratch resistant crystal Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion