The Observe is magnificent but large, having The form from the CK 2998 Speedmaster and turning it into a 45mm wide and 17.37mm thick beast of a look at well balanced out by a lovely aventurine dial and bezel and over the Sedna Gold bracelet, the Speedmaster Chrono Chime weighs https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/