SEIKO SNJ037 Prospex Solar Analog-Digital Diver's Watch Limited EditionLimited Edition of 4,000 commemorating the 40th anniversary of the 1982 H558-5000, the world's first analog-digital diver's watch with a chronograph and alarmProduction serial number engraved on casebackPowered by light energy - no battery change required5-month power reserve once fully chargedChronograph functionBlack uni-directional rotating elapsed timing bezelBlack dialDiving log, depth meter and sudden descent alarmWater temperature measurement functionPower reserve indicatorLocal time indication modeAlarmDigital time and date indicatorsEnlarged digital display for improved visibilityLumiBrite hands and markersScrewdown crown, pushers and casebackCase diameter: 46.9mmStainless steel case and bracelet with black hard coatingTri-fold push button release clasp with secure lock and extenderWater-resistant to 200 meters (660 feet), Diver's Watch. Follows ISO standards and is suitable for scuba divingCaliber H855