Close-up of a watch Ressence TYPE 3 Black Black Black with black background and white numbers Vertical close-up of a watch Ressence TYPE 3 Black Black Black with black background and white numbers

OIL FILLED

For a never-before-seen visual effect improving legibility.

Graphical illustration of Ressence oil-filled watches, showcasing the top part filled with oil and the bottom part filled with air
WATER DROP EFFECT

TYPE 3, TYPE 5 and TYPE 7 feature two separate sealed chambers, one filled with oil includes the ROCS as the other one filled with air includes the base calibre.

The upper half is filled with oil to obtain a never-before-seen visual effect - called water drop. Graphs appear to be projected onto the top crystal as if onto a screen.

LIGHT REFRACTION

One result is superior legibility. Refraction - the bending of light as it passes from one material to another, as from air to glass and vice versa - typically distorts perception. Here, because oil and glass share very similar responses to refraction, the eye is tricked into momentarily losing its depth perception.

The result is that the watch's dial seems ever closer, vision of it apparently unimpeded by glass at all.

Glass filled with water with a pencil in it, showcasing the distortion effect in water

We fill and seal our TYPE 3, TYPE 5 and TYPE 7 at -5 degrees Celsius. At this temperature the oil has minimum volume.

Close up view of a Ressence oil filled dial, showing the indication "contains petroleum" as seen on the side of the watch's dial. Vertical close up view of a Ressence oil filled dial, showing the indication "contains petroleum" as seen on the side of the watch's dial.

CONSTANT LUBRICATION

The ROCS is entirely enclosed in the upper half. All parts are suspended in oil and are therefore constantly lubricated, resulting in very low friction between the parts.

LIGHTWEIGHT CATEGORY

Every additional complication affects the precision of the movement's operation because of the additional forces required to actuate levers and gears. Following Archimedes' principle, thanks to the oil, the relative weights of components are lowered and this results in better timing precision.