The Shanghai 4131 movement, developed in collaboration with Clean Factory, offers a remarkable upgrade from the previous Shanghai 4130. With a power reserve of 75 hours and enhanced craftsmanship in plating, engraving, and assembly, the 4131 demonstrates superior quality and performance.

One of the key improvements of the 4131 movement is addressing the various issues seen with the Shanghai 4130, such as stability, inaccurate chronograph function, coarse finishing, incorrect sizing, winding feel, and automatic rotor noise. The 4131 movement delivers solutions to these problems with precision.

Clean Factory exclusively handles the production of the Shanghai 4131 movement, ensuring meticulous attention to each detail. Upon physical comparison with the genuine 4131, the Shanghai 4131 maintains similar appearance and dimensions, with minor differences in shock absorber stones.

The feedback from preliminary market tests has been overwhelmingly positive, and while it continues to undergo further assessment, consumers are encouraged to explore the high fidelity offered by this movement. The initial version features engraving that closely imitates authentic luxury standards, promising an impressive and true-to-original experience.