6T15 Day-Night Skeleton Movement | Custom OEM Solutions

Full Skeleton Caliber Architecture and Structural Reinforcement

Drawing inspiration from contemporary open-worked caliber engineering, we designed the 6T15 custom skeleton automatic movement around a fully exposed bridge layout. Specifically, removing unneeded dial plates unveils train gear engagement, ruby jewel bearings, and mainspring barrel winding in real time. Simultaneously, reinforced bridge walls maintain structural rigidity against mechanical impact. Consequently, the overall layout combines precise kinetic visibility with long-term rate stability for modern open-face watches.

Spherical Day-Night Indicator Module and Material Contrast

Where standard skeleton movements utilize flat printed discs, we engineered a three-dimensional spherical complication for this custom skeleton automatic movement. Therefore, a dual-color rotating sphere features deep blue lapis lazuli on one side and polished brass on the other. In fact, the sphere completes a full rotation every 24 hours to present a visual distinction between day and night. As a result, the caliber delivers functional astronomical tracking without obstructing lower gear train mechanics.

Manufacturing Precision and Technical Performance Specifications

Meanwhile, our assembly technicians maintain strict tolerance control over every gear train alignment and plate finish. Additionally, balanced automatic rotor weighting ensures smooth bidirectional winding efficiency to maintain stable mainspring power reserve. Simultaneously, standardized mounting dimensions allow seamless integration into both slim dress cases and aggressive modern chassis layouts. Turn the movement over, and the open-worked back profile provides full optical clarity through exhibition casebacks.