Modified Miyota 8215 Movement Tourbillon

The modified Miyota 8215 delivers reliable accuracy of –20 to +40 seconds per day, tested within 10–60 minutes after being fully wound. With about 40 manual turns, it reaches its full 42-hour power reserve for stable, dependable performance. The movement features a refined brushed finish, while the upgraded tourbillon-style display—crafted with gold-toned gears and blue steel screws—showcases mechanical rhythm through an open-worked window.

The movement’s architecture receives a refined transformation. Its plates feature a brushed metal finish that adds depth and sophistication, while the redesigned tourbillon-style frame showcases gold gears and heat-blued screws. Through the open-worked window, every rotation captures the mechanical rhythm that defines true craftsmanship.

A striking radial sunburst finish enhances the play of light across the movement, drawing attention to the gear train and ruby bearings—details that increase both durability and visual elegance.

Beyond its enhanced precision and aesthetics, this modified 8215 also supports extensive customization. Brands and watchmakers can tailor functions, finishes, and structural elements to create distinctive timepieces that fully reflect their design identity.