The 4R34 Seiko caliber with date display and a 24-hour hand is a mechanical caliber. The watch automatically charges itself while worn by converting the wearer's arm and wrist movements into energy. Movement of the watch causes the mainspring of the watch to be wound. This spring is the energy source. Manual winding of the movement is also possible. When the watch is fully charged, the watch has a power reserve of approximately 41 hours. The ticking number of this automatic is 21,600 per hour and the watch has 24 jewels. The diameter of the case is 42.5 mm and the case is 14 mm thick. Glass type: hardlex mineral glass. Strap width: 22. Case material: steel. Water resistance: 10 ATM. Technology: automatic.