Grand seiko watch mechanical sbgr051 this grand seiko automatic watch comes with a number of useful functionalities it is a mechanical automatic timepiece that is equipped with hand winding capability its calibre is 9s65 that has 35 bearing jewels the movement features a 72 hour power reserve this watch is protected from both water penetration and magnetic fields a date window is positioned at the 3 o clock mark additional functionalities include see through screw case back and high defini