Stuhrling Original Men's 'Monarch' Automatic Stainless Steel Pocket Watch, Color:Black (Model: 142.PK1) Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Reliable automatic-self-wind movement 21 jewels Grand calendar with day, date, month and year complications and 24-Hour indication with animated AM/PM display Krysterna scratch resistant crystal Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion