Grand seiko watch mechanical gmtsbgm221j this classic grand seiko gmt watch combines the style that has long captivated watch lovers with an evolved caliber 9s66 movement the watch has a 3 day power reserve and combines the latest in hairspring technology with an escapement developed through mems technology to achieve high accuracy and stability when wornthe grand seiko design embodies a pure classical elegance with a box shaped sapphire crystal zaratsu polished lugs a brown leather stra