Cal. 4R57 Movement, 29 Jewels, 21,600 vibrations per hour, Made in Japan Magnetic resistance 4,800 A/m Power reserve: approximately 41 hours Second hand halt mechanism (Hacking) Box-shaped Hardlex crystal Seiko Presage Side-Car-Cocktail, featuring champagne sunburst dial, makes the watch to look anew at every different angle. Snailed date counter. The watch has spherical/ domed hardlex crystal glass and see-thru caseback. Slightly bigger crown at 4mm to ease hand winding and time setting. Individually numbered on caseback.