Orbital Disc System

Ressence is not a brand: it is a system of thought applied to reading the time. The ROCS — Ressence Orbital Convex System — is the display module patented by Benoît Mintiens that replaces traditional central hands with biaxial eccentric satellites that rotate on themselves and around the central axis of the dial in an orbital manner. The result is time-reading by relative position of the discs, not by the angle of a hand.

The module is mechanically separated from the base caliber — often an ETA 2824-2 or 2892-A derivative — through magnetic transmission. This allows the upper chamber to be hermetically filled with special oil without the fluid contacting the movement. The oil eliminates reflections on the sapphire crystal, reduces optical distortion, and produces that nearly flat effect — paper-flat, as they call it — that makes the dial readable like a screen. It is not a secondary aesthetic effect: it is the technical reason for the oil.

Temperature variations between approximately -5 °C and +55 °C modify the volume of the oil. Ressence solves this with seven internal bellows — the bellows — filled with air or inert gas, which expand and contract in compensation. A free air bubble would be insufficient and visually unacceptable on a dial of this type.

The number of components in the ROCS module varies by version: the 1.3 variant mounts 27 gears on a single convex plane to indicate hours, minutes, seconds, and day of the week; other versions reach 107 total components. The ROCS 9 tilts the dial at 9.75° to improve readability on the wrist. Each version is numbered and differs both in the indications managed and in the material — Grade 5 titanium in the Type 3 EE, for example.

The e-Crown, introduced on the Type 2, adds an intelligent layer without touching the ROCS mechanics: it detects whether the watch is being worn, stops the movement when it is idle to conserve power reserve, and resumes time with a double tap on the crystal. Power comes from photovoltaic cells under the dial; Bluetooth manages a second time zone via app. The system integrates 87 mechanical and electronic components. On the Type 5, where a traditional crown does not exist, charging and adjustment occur from the caseback via the RCLS — Ressence Compression Lock System.

From the workshop: the oil-filled dial changes appearance with light. In backlighting it seems almost backlit. Those who do not expect it mistake it for a digital display. It is completely mechanical.