Left Side: (Genuine) — Right Side: (Shanghai 4131)

The 4131 movement, derived from the Shanghai 4130, boasts a 75-hour power reserve. Its polishing, plating, engraving, and assembly are independently completed by Clean Factory.

Thus, the 4131 Shanghai movement is a collaborative achievement between Shanghai and Clean.

Previous issues with the Shanghai 4130, such as instability, the chronograph function’s failure to reset to zero, rough polishing, incorrect dimensions, poor winding feel, and noisy rotor, have all been perfectly addressed in the 4131.

Moreover, Clean has exclusively contracted the production of the Shanghai 4131 movement.

Comparing images of the genuine 4131 and the SH 4131 reveals consistency in appearance and dimensions.

However, there are slight differences in some shock absorbers.

It’s crucial to highlight that the previous Shanghai 4130 and this 4131 are not of the same quality level in terms of details. A batch of internally tested products has already been released, receiving excellent customer feedback. Of course, this 4131 still requires market validation. We hope to give it some time, as it will surely bring you a pleasant surprise.

The engraving seen in the pictures is from the initial version; mass production will more closely resemble the genuine article. Overall, the fidelity to the original is exceptionally high.