A never-before-seen visual effect allowing to touch the Time itself.
TYPE 3 and TYPE 5 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 about 3.57 ml of 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.
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.
We fill and seal our TYPE 3 and TYPE 5 at -5 degrees Celsius. At this temperature the oil has its minimum volume.