The Observe is magnificent but huge, taking the shape from the CK 2998 Speedmaster and turning it right into a 45mm broad and 17.37mm thick beast of a look at balanced out by a good looking aventurine dial and bezel and within the Sedna Gold bracelet, the Speedmaster Chrono Chime https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/