Ressence Specialists

Benoît Mintiens presented his first working prototypes at Baselworld in 2010, and the brand's early watches followed in a small Zero Series and then a Series One. The name combines renaissance and essence, which is a fair description of a company that set out to rethink the way a mechanical watch shows time.

The Type 3 came in 2013 and introduced the oil-filled display that defines the brand. It won the Horological Revelation prize at the Grand Prix d'Horlogerie de Genève that year, and the brand's own product page records the award. The Type 1 followed in 2014 as a simpler, air-filled watch. The numbers don't follow the order of release, since the Type 3 came before the Type 1, so don't read the Type numbers as a timeline.

A diving model later extended the oil-filled idea to a mechanical dive watch, and the brand has since added references and special editions. For an owner, the important point is that each model has its own display module and case, and a service plan should follow the exact model rather than the family name.

ROCS, short for Ressence Orbital Convex System, uses curved discs that rotate within a larger dial to show the time, in place of hands that sit above a fixed dial. The display is mechanical, powered by an automatic base movement, and it is not a digital screen. The discs change position continuously, so the time is read from their arrangement rather than from a fixed pointer.

The Type 3 adds oil to the upper chamber, which the brand describes as about 3.57 milliliters. The oil reduces the optical distortion of the display, so the indications look almost flush with the sapphire. The base movement sits in a dry chamber below. Power passes from one chamber to the other through magnetic transmission, which avoids a shaft through the seal, and a bellows system compensates for changes in oil volume as temperature shifts.

That architecture matters for service. The base movement can be looked after by a watchmaker used to automatics, but the display module, the oil chamber and the bellows are Ressence's own. A shop that can work on the base alone is not enough for a complete service, and the display needs the brand's knowledge.

Ressence recommends a complete overhaul every three to five years, depending on how hard the watch has been worn, along with an annual water-resistance test. The brand says the overhaul should only be carried out at an authorized Ressence service center, and that unauthorized repairs invalidate the warranty. A complete service covers the movement and the case, and it includes replacing the gaskets, checking air and water resistance and demagnetizing the watch.

The retailer where you bought the watch is the first point of contact for warranty work. You bring the watch and the warranty card to any authorized Ressence retailer, and it forwards the watch to the nearest authorized service center. The after-sales address on the brand's site is a direct email route if you need to describe a fault or send photographs first.

Out of warranty, the brand's published terms still say the overhaul should be done at an authorized center. Before you agree to any work, ask the center how it handles the oil chamber and the bellows, what it replaces at overhaul, and how it will confirm the water-resistance result.

Ressence's warranty covers manufacturing defects for two years from the original purchase date. The card must be completed, dated, signed and stamped by the authorized retailer that sold the watch, and normal wear, accidents, improper use and careless handling are excluded. A watch that has been opened or repaired by anyone other than an authorized center can lose that cover, so keep the paperwork with the watch.

The warranty is separate from any paid service. The brand's terms do not state a separate warranty on servicing work, so ask the center in writing what it will cover on a service and for how long before the work begins. A written answer is more useful than an assumption based on the watch's original warranty.

Handle the watch with the caseback controls in mind. The winding and setting work through the rotating sapphire caseback rather than a crown, so an owner should learn the routine from the brand's instructions before using it. Setting the watch correctly is part of looking after it.

The reference matters more with Ressence than with many brands. The Type 1 has gone through several generations, including the original, Slim, Squared and Round versions, and their specifications differ in case size, movement and display module. Check the watch against the reference, not the family name, and ask the seller for the exact reference and the papers that match it.

Inspect the display. The discs should turn smoothly through their full cycle, and the oil-filled Type 3 should show a clear, consistent display without fogging, cloudiness or oil on the outside of the crystal. Ask about the seals and any service history, and check the caseback controls for smooth operation. A display that has been opened or refitted outside an authorized route is a reason for caution.

Choose a specialist who can explain the display module and who will check the oil chamber and seals on an oil-filled model. An authorized center is the safest route for warranty work, and an independent with ROCS experience can be a reasonable choice out of warranty. Ask for a written estimate that separates the movement, the case and the display work, and ask for the old parts to be returned.