Hamilton jazzmaster chrono quartz is both functional and stylish the watch is equipped with swiss made eta 251471 quartz calibre that is powered by a battery the chronograph of the timepiece is equipped with a 60 seconds a 30 minute and a 110th of a second sub dial hands are luminous for improved night time visibility additional useful features include a centre sweep seconds hand screw in case back pushpull crown and scratch resistant sapphire crystal glass