Decennium Tourbillon

Automatic Tourbillon

description movement specifications
1941 Decennium<br>automatic tourbillon front
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1941 Decennium
automatic tourbillon

To celebrate the company's 10th anniversary, Grönefeld has unveiled the '1941 Decennium Tourbillon'. This timepiece is endowed with an array of features, designed to indulge the desires of watch connoisseurs.

An automatic tourbillon movement ensures the mainspring is optimally wound, resulting in less variation in the rate of the movement. In normal use, the wearer does not need to operate the crown. A self-winding movement confers convenience, making it ideal for daily use.

Measuring 39.5mm in diameter, with a restrained height of 10.5mm, the platinum 1941 case is the epitome of elegance, courtesy of its discreet mien.

The time-consuming creation of each movement means that production will be limited to only 10 examples of the Grönefeld 1941 Decennium Tourbillon.

place your reservation € 145,000.00 excluding taxes

balancing mechanics and aesthetics

Despite embracing a new means of powering its latest watch, purists can be rest assured that Grönefeld's exalted standards of finish prevail. The stainless-steel bridges replicate the facades of the Dutch houses, termed 'bell gables'. They are hand-bevelled, evincing a brilliant gleam. The centres deliver a sublime contrast with their micro-blasted surfaces and are adorned with relief engraving.

The cage of the flying tourbillon, a tourbillon without an upper bridge, is made of stainless steel. The Horological Brothers use stainless steel for the cage and the aforementioned bridges because it is not liable to corrosion and, as such, proffers lasting benefits to the owner. Working with stainless steel requires great patience, but Bart and Tim believe the end result substantiates the time expended.

The 5-arm, double spoke gear train wheels exhibit a contemporary character with their circular grained surfaces paying due reverence to fine watchmaking tradition. The movement includes a balance wheel with white gold timing screws and is equipped with a free-sprung over-coil hairspring with triangular stud.

Gold chatons stand testament to the no-compromise specification of this movement. In addition, the mirror polished screws feature chamfered rims and slots. Numerous surfaces gleam, courtesy of the mirror-polishing which has been patiently executed by time-served hands. The inventory of different decorations includes snailed, grained, spotted and frosted surfaces, indulging the desires of purists.

Details make perfection and perfection is not a detail. Leonardo da Vinci

balancing mechanics and aesthetics

Technical specifications

Movement

Movement dimensions Diameter: 32,0 mm
Thickness: 5,5 mm
Number of parts 259 parts
Power reserve 56 hours
Number of jewels 30 jewels, partially set in solid gold chatons
Automatic system Uni-directional winding mechanism.
For 24 hours of autonomy 633 rotations of the Oscillating mass are required
Oscillating mass Entirely decorated by hand. 22 karat solid gold. Pivoted on a high precision ceramic ball bearing to avoid excessive wear and the need of lubrication
Tourbillon cage One-minute flying tourbillon cage pivoted on ceramic ball bearing.
Single arm upper cage bridge. Lower Cage and upper cage are both fabricated in stainless steel
Balance wheel Variable-inertia balance wheel with four white gold timing screws (diameter 10 mm)
Frequency 21.600 vibrations/hour
Balance spring Free sprung with Phillips terminal over coil curve with triangle hairspring stud
Escapement Jewelled lateral Swiss lever escapement
Main Plate Spotted and ruthenium electroplated brass main plate
Bridges Stainless steel, bevels polished by hand, micro-blasted center, circular grain on the top to highlight the bridges shapes and relief engravings
Indicators Central hour and minute hands

Case and dial

Limited edition 10 pieces only
Case material Platinum Pt950
Case dimensions Diameter: 39,5 mm
Thickness: 10,5 mm
Water resistance 3 atmospheres – 30 meters – 100 feet
Engraving Grönefeld, Platinum, Pt950 and serial number
Crown Platinum Pt950, engraved with The Horological Brothers logo
Dial Sterling Silver 925, Matte gray lacquered with highly polished hour-markers and circular sector
Hands Extended Lancette hands. Flame-blued steel and mirror polished centres.
Strap Matte black genuine alligator, black stitching and alligator lining.
Buckle Platinum Pt950 engraved with Grönefeld
Crystals Domed sapphire crystal on the front with hard anti-reflective coating on both sides
Flat sapphire crystal on the back with hard anti-reflective coating on both sides
Number of components 49 parts
Total weight 118 Grams

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Bart
Making the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.

Handtekeningen
Tim
BartTim
Making the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.
Handtekeningen