The TW4131 Cosmic Daytona is officially here. It is the true proprietary movement version of the 4131.The TW 4131 movement is developed directly based on the original 4131, featuring a reasonable design and excellent stability.In contrast, the Shanghai 4131 movement is modified from the 4130 movement, which is based on 7750 technology. For example, the use of fake bridges and fake shock absorbers results in poor stability and difficult maintenance.Choosing the right version is crucial, and we look forward to providing more comparative information soon! .Highly recommended, it is currently the most stable version in all aspects.