Every 9S movement is made at the Grand Seiko mechanical watch facility in Shizukuishi in northern Japan. Within the same facility is a studio where the movements and then complete watches are assembled and adjusted by hand by a team of craftsmen and women who have honed their craft to such an extent that they can adjust parts by hand to tolerances of one hundredth of a millimeter. Once each movement is assembled, it is tested over the course of 17 days, at three different temperatures and in six different positions.