How about Seiko 7s2'' movement? 、

Very good. Improve the practical performance of the watch, adopt double calendar display, and automatically wind it in two directions through Seiko patented magic rod system, which makes the experience more comfortable and avoids scratching the watch mirror. The flat mirror is more prone to specular reflection under water, easier to read the watch, luminous and bright, comfortable overall literal color matching, characteristic strap and bracelet, firm link, brushed and polished surface, solid feel and excellent design. The weight of the bracelet is amazing, in order to balance with the heavy case. With double buttons with insurance and diving expansion buttons, the whole bracelet gives people an excellent sense of security, which is simple and practical.