This is the world’s first model to feature the technology now known as the "ring solar," in which solar cells are arranged in a ring shape. The model name Eclisse is Italian for astronomical phenomena such as solar and lunar eclipses, as well as meanings like "to cover" or "to hide." The solar cell, located in the gap between the glass and the dial, is likened to the diamond ring effect seen during an eclipse.
Normally, Eco-Drive places the solar cell beneath the dial, requiring the use of light-transmitting materials for the dial. However, this model eliminates that restriction, making it possible to use a metal dial. The choice of a white opaque painting with polished coating for the metal dial brings a refined texture while ensuring excellent legibility.
The case and band have a gentle bulge and a smooth finish that is not overly assertive, resulting in an elegant appearance. The center is polished, while the sides have a hairline finish, creating a flow of texture and a clean look.
Overall, unnecessary elements have been removed for a sophisticated appearance, giving a sense of luxury. This is a universal design meant to deliver world-first technology to many people.
The model name Eclisse is Italian for astronomical phenomena such as solar and lunar eclipses, as well as meanings like "to cover" or "to hide." The shining bar indexes and the round, full bezel symbolize the sun, while the hairline-finished, full-flow shaped case and band evoke the shadows created in contrast, resulting in a symbolic design.
Composed of band links with a smooth bulge.
Beauty that transcends gender. It has an atmosphere reminiscent of celestial bodies.
A design that combines a rounded, full-flow form with a futuristic and organic impression.
The crown has a shape reminiscent of a mushroom cap. The three recessed accents on it provide highlights against the case.
The base of the dial features a white opaque painting with polished coating. It has a moderate gloss, giving it an elegant and luxurious feel.
The gentle roundness gives the dial a soft accent. The pointed tips make it easy to read the time.
A band with few straight lines, rounded, smooth, and luxurious.
ENGINEER'S EYE
The Catcher in the Light
A model equipped with Cal. F810, which for the first time adopted a “ring solar” structure: to overcome the Eco-Drive dial material constraint—that is, the inability to use opaque metal dials—we rolled strip-shaped flexible solar cells into a cylinder and positioned their light-receiving surfaces perpendicular to the dial.
Because this was a first-of-its-kind structure, we spent significant time investigating charging performance under various conditions and optimizing it. The key was configuring the solar cells in a single stage instead of the conventional four-series arrangement. As a result, even when the watch is tilted relative to the light direction or partially shaded by a sleeve so that only part of a solar cell is illuminated, the charging amount remains stable. The drawback of lower generation voltage is addressed by incorporating a circuit that boosts the voltage to a level that can drive the watch.
Moreover, with this ring solar structure, while strong generation under direct sunlight on clear days is a given, on cloudy days sky light is evenly diffused throughout the space, allowing light to wrap around to the solar cells and deliver solid power generation performance.