Romain Gauthier Micro-Rotor Lady Opal cover

Pre-SIHH 2019: Romain Gauthier Micro-Rotor Lady Opal

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With Insight Micro-Rotor Lady Opal, Romain Gauthier has created a luxury ladies’ watch that sees colour, sparkle and sublime craftsmanship spectacularly come together.

Romain Gauthier Micro-Rotor Lady Opal

The hour-minute subdial, small seconds and mainplate cover are made out of semi-transparent Australian crystal opal that has been skilfully finished by hand. This gemstone exhibits flashes of pink, green, purple and turquoise in a majestic play of colour.

Romain Gauthier Micro-Rotor Lady Opal

Powering the indications is an in-house, automatic calibre that boasts a 22k gold bidirectional micro-rotor, the front of which is snow set with brilliant-cut diamonds of varying sizes.

Romain Gauthier Micro-Rotor Lady Opal cover

The scintillating micro-rotor is framed by a cut-out in the opal-adorned mainplate. It turns smoothly and inaudibly between two bridges, each fitted with a friction-minimising, wear-resistant ruby bearing. In whichever direction the micro-rotor sways, it winds a serially operating double mainspring barrel offering 80 hours of power at full wind.

The glorious opal subdials and mainplate cover set off the red gold hands, gilded balance wheel and red gold treated plaquette and bridges that are hand-bevelled and straight-grained, while the arcs of the bridges neatly marry with the inside curve of the red gold case. The case’s 39.5mm diameter, combined with the white natural rubber strap that mirrors the contours of the lugs, provides a snug fit on slender wrists.

Other design details of the case include a lip in the caseband that flares out to join with the bezel; the crown positioned at 2 o’clock to free up space for wrist movement; and the bombé sapphire crystal which rises so that its highest point is over the hour-minute display, the de facto centre of the dial.

Romain Gauthier Micro-Rotor Lady Opal

More of the movement can be admired through the display back. Here, the micro-rotor can be seen engaging the visible train of gears, beginning with the reversing gear that gives the mechanism its bidirectionality. The gears and ratchet wheels are notable for their circular spokes which have been bevelled.

Finally, the golden bridges – which feature hand-made, hand-polished bevels and jewel countersinks – are secured in place using Romain Gauthier’s in-house screws with S-slot heads. The sweeping shapes of the bridges contrast with the linearity of the straight-grained finishing and four plaquettes.

Insight Micro-Rotor Lady Opal is a five-piece limited edition in 18k red gold.


Australian crystal opal dial and mainplate cover

The semi-transparent crystal opal used to make the dial and mainplate cover of Insight Micro-Rotor Lady Opal is from the town of Coober Pedy in South Australia, often described as the opal capital of the world. It was collected at source by a connoisseur of rare gemstone almost half a century ago.Romain Gauthier Micro-Rotor Lady Opal

This precious opal is regarded as the finest thanks to its highly stable internal structure that makes it diffract light, resulting in a resplendent play of colour. Its compactness and low porosity mean its vibrant appearance will remain constant over time.

Romain Gauthier Micro-Rotor Lady Opal

Once the raw opal is carefully selected, a wire saw is used to remove an ultra thin slice which is then fixed onto a heated baseplate with tree resin, after which the outline of the hour-minute subdial, small seconds and mainplate cover are cut using a three-axe machining centre.

Romain Gauthier Micro-Rotor Lady Opal

The one-piece mainplate cover bears a complex shape with a figure of eight cut in the centre to accommodate the small seconds and balance wheel.

Romain Gauthier Micro-Rotor Lady Opal

The lapidary then fixes the slice onto a brass block with resin before rubbing it by hand on a glass board covered with a mixture of diamond powder and water in order to make the opal the right thickness – 0.28mm for the subdials and 0.35mm for the mainplate cover.

Romain Gauthier Micro-Rotor Lady Opal

In fact, the lapidary leaves 0.06mm more than is needed so he has enough opal to work with for the polishing stage which consists of pressing the opal gently against a turntable covered with fine felt and white cerium oxide solution.

Given that each opal dial and mainplate cover is different, and each arrangement of the diamonds decorating the micro-rotor is different, no two Insight Micro-Rotor Lady Opals look the same.

 In-house automatic movement

Developed, produced, decorated, assembled and regulated at Manufacture Romain Gauthier in the Vallée de Joux, Switzerland, Insight Micro-Rotor Lady Opal’s movement has been designed to be highly visible so the observer can acquire an immediate appreciation of the mesmerising mechanics and immaculate hand-finishing, hence the moniker “Insight”.

 The bidirectionality of the micro-rotor is accomplished via a reversing gear. The axis of this gear glides side to side, guided by an aperture cut within two arc-shaped steel plates that have been black-polished to enhance the gear’s rotation and lateral movement. When the micro-rotor changes direction, it drives the toothing of the reversing gear in the opposite direction, making the reversing gear slide this way too.

Given the relative weight of the micro-rotor, Romain Gauthier has chosen to sandwich it between two bridges for superior stability, rather than designing a ‘flying’ rotor supported by just one bridge from beneath.

Both ends of the micro-rotor axis turn in a ruby-lined pivot hole. The rubies have a high wear resistance and low coefficient of friction helping to create a silent, fluid rotation of the micro-rotor compared to, say, metal ball-bearings, which can entail wear and noise.

The two mainspring barrels offer 80 hours of energy when fully wound. The barrels are in series for more constant power to the regulator that features the Romain Gauthier balance wheel featuring curved arms and calibrated eccentric weights, as well as a hand-assembled pallet lever that is triangular for more rigidity.

 Last but not least, the superlative movement decoration includes hand-made and hand-polished bevels, hand-frosting, circular-graining, straight-graining and snailing, in addition to hand-made and hand-polished jewel countersinks.


Technical Specifications


  • 18k red gold featuring Australian crystal opal dial and mainplate cover – five-piece limited edition

 Features and indications

  • Off-centre hours and minutes, central small seconds
  • Australian crystal opal dial and mainplate cover
  • 18k red gold hands
  • In-house,  automatic movement featuring 22k gold bidirectional micro-rotor
  • Micro-rotor snow set with approx. 45 brilliant, round VVS to VS diamonds of varying sizes (0.1 carat)
  • Double mainspring barrel in series for generous 80-hour power reserve

Movement and finishing

  • Dimensions: 32.1mm x 6.8mm
  • Power reserve: 80 hours
  • Number of jewels: 33
  • Number of components: 206
  • Balance frequency: 28,800 vph / 4Hz
  • Components in: 22k gold micro-rotor, steel, stainless steel, beryllium copper, brass and German silver
  • Finishing: Highest-level haute horlogerie hand-finishing
  • Treatment: 5N red-gold treated bridges


  • Dimensions: 39.5mm x 12.9mm at highest point
  • Water resistance: 50m/5atm/170ft
  • Sapphire crystal with interior anti-reflection coating, front and display back
  • Crown for winding and time-setting at 2 o’clock

Strap and buckle

  • White strap in natural rubber with red gold pin buckle



Romain Gauthier

Founded in 2005, Romain Gauthier is a high-end watch brand based in the Vallée de Joux, Switzerland, led by its passionate founder Romain Gauthier. Gauthier marries the know-how that he has developed living, studying and working in this picturesque valley – the heart of fine Swiss watchmaking – with a no-compromise approach to haute horlogerie to create exceptional timepieces.

These timepieces have been hailed for their eye-catching designs, innovative in-house movements and extremely high level of hand-finishing. Their exclusivity is ensured by the very small numbers in which they are created – about 60 pieces per year.

The man who built the brand

Romain Gauthier was born in 1975 in the Vallée de Joux, Switzerland, the cradle of fine Swiss watchmaking. It was here that Romain developed his passion for traditional haute horlogerie, his grasp of mechanics and engineering, and his eye for design.

Having studied precision-mechanics at technical college, Romain qualified as a constructor of precision machinery in 1997. A year later, he started his first job as machine programmer-operator at a horological components manufacturer that he helped turn into one of the best-performing facilities in Europe.

Determined to build from scratch not just his own high-end watch, but also his own high-end watch brand, Romain completed an MBA in 2002. His final thesis was the business plan for his own watch company.

After working behind closed doors on his own timepieces for three years, he launched the Romain Gauthier brand in 2005, unveiling its first timepiece Prestige HM at Baselworld 2007. This was followed by Prestige HMS (2010), Logical One (2013), Logical One Secret (2014), Insight Micro-Rotor (2017) and Insight Micro-Rotor Lady (2018). These encompass classically refined pieces, contemporarily casual creations and ethereal objets d’art, all featuring supremely finished in-house movements.

In 2013, the jury of the Grand Prix d’Horlogerie de Genève – the Oscars of watchmaking – awarded Romain Gauthier’s Logical One the prize for Best Men’s Complication.

Manufacture Romain Gauthier

Romain Gauthier’s ability to create exquisite timepieces is in large part thanks to his manufacture, based in Le Sentier, Switzerland, that he has steadily built up.

The manufacture blends skilled craftsmen and time-honoured watchmaking tools with experienced technicians and cutting-edge production methods, allowing Romain Gauthier to design, produce, decorate, assemble and regulate in house all movements for the brand’s timepieces.

While this savoir-faire means that quality is uncompromised and precision is impressive, it also imbues Romain Gauthier timepieces with a rare beauty and unique soul.

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