GT-01S

built to last
generations

We wanted to create one of the highest quality movements, one that’s accurate, reliable and finished to an incredible level— focusing not only on the final result but also the most efficient, reliable and robust way to achieve it—a grand complication for everyday wear.

We didn’t build this movement; we worked with a team of the greatest talents in the world. Pillars of accuracy and watchmaking, with centuries of experience. Masters in the heart of Switzerland crafted every omponent of this engine. Companies including Atokolpa, TEC Ebauches and Generale Ressorts, the same companies who have worked with Audemars Piguet, Richard Mille and now Aventi.

More accurate than a Chronometer

Over four days of power reserve

Shock resistant to a car crashing at over
200 KM/H

magnetic resistant to over 500 metal detectors
at a single time

Servicing required only once every 5 years

100%
Swiss made

All of these components are brought together in La Chaux-de-Fonds, Switzerland, a city of great importance in watchmaking. 150km north of Geneva, La Chaux de fonds is where Swiss watchmaking became the gold standard. Some of the finest watches in the world were designed and produced here; Gerrad-Perregaux, Greubel Forsey, Omega, Rolex’s first Swiss operation and now Aventi.

Our movement is made in partnership with Olivier Mory - our master watchmaker who worked with AP concept on the Richard Mille RM001.Crafted in solid grade 5 titanium. Each edge is bevelled and polished, every facet finished with perlage. Protected by a medical-grade carbon black coating, decorated with deep gold engraving. Our workhorse movement, built on the shoulders of giants.

Production Process The GT-01S Movement is produced in 5 stages.

Stage 1
Stage 2
Stage 3
Stage 4
Stage 5

Crafting the titanium base plate

The unique grade 5 titanium base plate is machined in partnership with TEC Ebauches. One of the leading names in high tolerance and complex machining, working with brands as Purnell and other complicated tourbillon movements. Working with grade 5 titanium can be twice as challenging as working with convention movement materials. The baseplate is the foundation for the rest of the watches components to be built within. Each baseplate is milled from grade 5 titanium to match the exact shape of the Aventi case. The baseplate determines the placement of every component in the watch. Using 3D modelling, the exact placement of the recess and holes for every component is mapped out and cut into the base plate within a minute tolerance.

Movement finishing

Every aspect of the GT-01S demonstrates a level of detail beyond reason. Every aspect is flawless. Each edge has been bevelled and polished, and every screw has been perfectly countersunk and torqued. Perlage finishing covers every millimetre of the front and back of the movement. ‘Swiss-Made’ mark engraved in deep-gold. Protecting the intricacies of the finish is a medical-grade black carbon coating. This coating is applied atom by atom in a vacuum chamber, protecting the movement while allowing the finishing to shine through.

Movement assembly

The 63 components of the GT-01S are hand Assembled and tested in La Chaux-de-fonds. Each component is individually inspected and then placed within the movement in a specific order. The assembly of the tourbillon cage alone can take as long as assembling all other components.

Tourbillons are one of the most sought-after and mesmerising complications in watchmaking—a complex balance of components with weights that must be uniformly distributed throughout the mechanism. However, unlike a traditional tourbillon with an average of 40 components, the GT-01s Tourbillon cage has only 18. This reduction in complexity assists in the reliability and efficiency of the movement.

Hand setting the pigeon blood ruby

Looking at the skull, you will see two glowing red eyes staring back at you. One the movement jewel in the barrel, the other a natural pigeon blood ruby. It is one of the rarest gems on earth, handset into your movement. Every ruby is hand-picked for colour and clarity and confirmed for authenticity with IGI testing for each selection. Rubies are very rarely seen in fine timepieces, a pigeon blood ruby is almost unheard of.

Quality control and testing

Once Each movement has been assembled, it is individually inspected and the rate adjusted by master watchmaker Olivier Mory. This adjustment is the process Olivier has stated he finds both the most difficult and the most enjoyable.

The rate adjustment process is critical to the accuracy of the movement by making precise adjustments to the balance spring within the Tourbillon cage. These adjustments are made to ensure exactly six oscillations of the balance wheel occurs per second. If the Balance wheel oscillates too slowly, the spring is pulled shorter, too fast, and length can be added to the balance spring.

Testing

Once Each movement has been assembled, it is individually inspected and the rate adjusted by master watchmaker Olivier Mory. This adjustment is the process Olivier has stated he finds both the most difficult and the most enjoyable.

The rate adjustment process is critical to the accuracy of the movement by making precise adjustments to the balance spring within the Tourbillon cage. These adjustments are made to ensure exactly six oscillations of the balance wheel occurs per second. If the Balance wheel is oscillating too slowly, the spring is pulled shorter, too fast, and length can be added to the balance spring. The rate adjustment process is a time consuming and intricate process, taking years of training and experience to be done effectively and efficiently.

Once the movement has been adjusted, and the accuracy checked, the movement will go through a final inspection to ensure nothing less than perfection. The movement is now ready to be mounted within the case, Breathing life into the Aventi A13.

The GT-01S, a 100% Swiss Hand-wound tourbillon is a movement like no other. Designed with reliability, efficiency and longevity while pushing the limits of movement finishing. Watch movements aren't the product of just one person or a single brand. A team of some of the greatest talents in the world creates them. We worked with the same talents that are responsible for the movements of Richard Mille, Audemars Piguet, Piaget, Panerai, and IWC and now Aventi.

Our workhorse movement, built on the shoulders of giants.

Production
Details

Production Details Crafting the base plate

The unique grade 5 titanium base plate are machined in partnership with TEC Ebauches. One of the leading names in high tolerance and complex machining, working with brands as Purnell and other complicated tourbillon movements.The First step in the assembly of the movement is the baseplate. Milled from grade 5 Titanium, this is the foundation for the rest of the watches components to be built within. Each baseplate is milled from grade 5 titanium to match the exact shape of the Aventi case. The baseplate determines the placement of every component in the watch. Using 3D modelling, the exact placement of the recess and holes for every component is mapped out and cut into the base plate within a minute tolerance. Once completed, the watchmaker can begin removing any titanium not absolutely necessary. Thus, removing excess weight from the movement and allowing a better view of all the movements components.

Production Details Winding and setting Mechanism

The winding and setting mechanism is first assembled into the base plate. The connection between the engine and the crown, this mechanism is the keyhole to the finely tuned motor of the movement. The winding pinion is placed into the movement, alongside the sliding pinion, both are secured in place as the winding stem is slotted into the movement. The sliding pinion is a two-sided gear that moves up and down the winding stem to change the function of the crown. Changing the gear from fueling the engine to setting the time.

Production Details Powertrain

As the watch is wound, the energy is stored within the barrel, the engine’s fuel tank. A cylindrical box with an outer ring of teeth houses the mainspring. The barrel provides the energy for every function of the watch. Mainsprings are hardened steel strips thirty centimetres in length. The coil of steel is attached to the axle and barrel wall. Turning the crown, rotates the central axel coiling the mainspring. Giving 4-days of power from a single barrel. Once the barrel is mounted in the baseplate, the intermediate and third wheels begin the gear train assembly. The Third wheel is the connection between the barrel and the Tourbillon. A finely toothed gear transfers the energy stored in the barrel to move the perpetually rotating tourbillon cage.

Production Details Winding Mechanism

The winding mechanism transfers the winding from the crown to the main spring in the barrel, like filling a tank with fuel.The ratchet wheel is attached to the barrel and serves two purposes. To connect the barrel to the crown and to stop the fuel tank from leaking fuel. This is done with the click, a spring-loaded piece that will only allow the ratchet wheel to move in one direction. It is also responsible for the iconic clicking sound of hand winding a watch movement. However, unlike most watch movements, the GT-01S does not use an external spring but instead has integrated the spring into the piece.

Production Details Tourbillon cage

The GT-01S tourbillon cage contains only 18 components, where most Swiss tourbillon cages have 40. First, the escapement wheel is placed into the lower cage bridge. The escapement wheel and pallet fork control the connection between the fuel stored in the barrel and oscillation of the balance wheel. Unlike a conventional movement, the escapement wheel is not powered directly by the power train; instead, rotation of the tourbillon cage moves the escapement wheel. As the tourbillon cage rotates, the escapement wheel rotates until the pallet fork stops it. The Pallet fork is a T-shaped lever that controls the energy flow. When the balance wheel releases one side of the pallet fork, the escapement wheel can advance one tooth before being caught by the other side of the pallet fork. Then it is released again by the return swing of the balance wheel. The Balance wheel is the beating heart of the movement: a perfectly balanced ring, oscillating back and forth to determine the length between releases of energy. The speed of this oscillation is precisely tuned by adjusting the length of the balance spring. This adjustment ensures that the balance wheel performs exactly six oscillations per second. This is the movements frequency. Lastly, the tourbillon cage is sealed together by three titanium screws; securing the upper cage bridge to the pillars of the lower bridge.

Production Details Tourbillon

Now that the tourbillon cage has been assembled, it must be secured into the movement. First, the second’s wheel is secured to the base plate, a fixed gear that drives the escapement wheel as the tourbillon cage rotates. The tourbillon cage is precisely moved into the movement main plate and the second’s pinion is carefully aligned and meshed with the third wheel of the powertrain. The Tourbillon cage is secured by the grade 5 titanium bridge, uniquely designed to allow a shock resistance of 5000G and secured in place by two specially crafted triangle head screws. This completes the gear train. The movement now can store, start and stop the flow of energy.

Production Details Hour setting

The Hour setting mechanism is responsible for converting the pulses of the movement into readable time—a deceptively complex collection of stacked reduction gears that control the watch hands. The central component of the hour setting mechanism is the cannon pinion, a small tube with a toothed gear at one end. The cannon pinion is slotted over the pinion of the intermediate wheel and will control the minute hand. The next component is the minute wheel, the connection between the cannon pinion and the power train. Using a specific gear ratio ensures that the cannon pinion does a full rotation every hour. A calculation converting 21600 individual balance wheel oscillations into an exact 60 minute period. The final component is the hour wheel, slotted on the cannon pinion; it controls the hour hand. Using a reduction gear to ensure the hour hand does 1/12th of a rotation for each full rotation of the cannon pinion.

Production Details Movement finishing

Every edge has been individually bevelled and mirror polished, and each screw has been perfectly countersunk and torqued. Perlage finishing covers every millimetre of the front and back of the movement. ‘Swiss-Made’ mark engraved in deep-gold. The GT-01S is created with grade 5 titanium plates and bridges, a very rare material to see in high end watchmaking. Crafting this material can be twice as difficult as a conventional movement material due to the hardness of titanium. Perlage finishing has long been the mark of high end watchmaking. Hundreds of concentric overlapping circles are individually applied to the metal’s surface in an exact pattern. Due to the unique shape of the GT-01S, there is no way to automate this finishing in a machine; the process must be done manually. The result is the artistry and skill of the watchmaker.Protecting the intricacies of the finishing is a medical-grade black carbon coating. An alloy of solid carbon is vaporised and attached to the surface of the movement atom by atom. A coating only 2-5 microns thick, that will protect for generations.This coating does not level the material surface, which means that any imperfections in the perlage finishing will be visible.