It looks nearly identical. It fits the same 1.2mm pinion heights, the same dial feet positions, and the same hands (150/100/17 microns). But inside, the copper coil is cheaper, the lubricant in the gear train is less stable, and the IC chip lacks the power-saving algorithms of the Miyota.
This is currently the most reliable method for using a second-hand ECU. vd56.1 clone
Technically, a "clone" of a quartz movement is absurd. Mechanical movements can be cloned screw-for-screw. Quartz? That requires reverse-engineering a circuit board, a stepping motor, and a plastic train of gears. The so-called VD56.1 clone is not a 1:1 replica. It is a —often manufactured by Chinese movements houses like Sunon, Ronda’s Chinese partners, or generic "No Name" factories. It looks nearly identical
The VD56.1 clone is of interest for transgenic studies due to the specific P151L mutation. This is currently the most reliable method for