Model Name Grand Seiko Sports Collection Ref NoSBGJ237 SizeMen's Case diameter 44.2mm Index bar BeltBracelet Color blue Dial Material SS Bezel Rotating bezel (24H) Movement Automatic Specifications / Notes Master Shop Limited Edition Water resistant to 200m Equipped with Caliber 9S86, a high-beat movement that beats at 36,000 vibrations per hour Power reserve: approx. 55 hours This model is equipped with a two-tone blue and white bezel. The bezel is made of a sapphire crystal hollowed out in a ring shape. The case is large (44.2mm) and the crown is positioned at 4 o'clock so as not to interfere with the movement of the wrist.