“My intention is to always try to get off the beaten tracks, to take watchmaking
creations to new dimensions, present outstanding watches that
convey a particular vision of watchmaking.

I invite you to discover the first chapter of the “Master of Escapements” series with the Central Impulse Chronometer.“

Chapter 1

Central Impulse Chronometer

Innovation and elegance in chronometry

Introduced to the public in the spring of 2020, the first prototypes of Bernhard Lederer´s latest project have gathered global, unanimous acclaim.

The first chapter of the Master Of Escapements series is a 44-mm wide timepiece containing one of the most original, sophisticated and advanced wristwatch movements ever.

Heir to the works of Harrison, Breguet, Le Roy, Bond and Daniels, it is a certified chronometer according to the stringent criteria of the Besançon Observatory.

Its harbors a new, high-yield, double impulse escapement, entirely designed by Bernhard Lederer with maximum efficiency in mind.

Entirely designed and crafted in-house, it goes through a painstaking process of finishing, including extensive hand beveling, sandblasting, engraving, satin-finishing and polishing.

The long and linear polished bevels of the remontoir and anchor-bridges jump to the eye. But the grain-like texture of the mainplate and barrels is equally challenging.

Calibre 9012 is really a work of architecture: it is a structure, a functional construction and a design.

Openworked bridges, proprietary wheel spokes, three-dimensional construction all rely on the Bernhard Lederer workshop’s thorough set of skills and equipment.

The Escapement

Inventing a new, reliable, self-starting, energy-efficient, wristwatch-compatible and high-accuracy escapement is the pinnacle of watchmaking.

Bernhard Lederer used Breguet’s natural escapement’s cornerstone idea as a foundation, and designed an entirely new, sophisticated escapement in its own right.

It furthers the works of Bernhard Lederer’s admired peers, including George Daniels and his Independant Double Wheel Escapement, who tried themselves at the creation of such a device, and completes them.

The Central Impulse Escapementis based on a pair of escape wheels, interacting with a special anchor, made of titanium and featuring a total of 3 pallet-stones, with a unique shape and optimal geometry.

Its impulse positions, angles and contact timing are designed to dramatically lower friction and therefore, guarantee optimal accuracy.

The anchor’s contacts with the escape wheels are very light and smooth, transferring the energy quite gently. The tickings and the sound of the remontoirs working alternately, provide the Central Impulse Chronometer with a unique acoustic signature.

The Case

The Central Impulse Chronometer is a pared-down, elegant timepiece worthy of Bernhard Lederer’s sense of design. Its 44-mm case is sized according to the dimensions of the 9012 calibers.

It is made of 18k white gold, finely polished with a slim bezel. It is fitted with short, ergonomic lugs.

Its thickness is only 12.2 mm, a feat considering the sophistication of the caliber it houses.

Both front and back crystals are domed and wide glass boxes. The back one reveals the expanse of a breath-taking architectural and horological creation.


The Dial

The dial is either a deep blue or rhodium plated and features a pattern, morphing from square to rectangle and back to square. The applied indices and the slender, open sword hands are diamond cut and finished by hand polishing.

The dial’s intertwined eight-shaped openings bear the seconds’ hands. They provide an intimate view on both escape wheels and the inner, intricate architecture of the 9012 calibre.

Limited Edition

Technical Details

Reference 9012

Reference: 9012
Functions: Hours, minutes, small seconds at 8 and 11 o’clock
Diameter: 44 mm
Thickness: 12.2 mm
Case back: Open, sapphire glass with double anti-reflective coating
Water resistance: 3 ATM
Dial: Guilloché with morphing pattern, with two circles interlocked in a figure eight.
Available in two colors, rhodium and dark blue.
Number of components: 210
Number of jewels: 45 rubies
Frequency: 21,600 vibrations per hour (3 Hz)
Diameter: 39.3 mm
Thickness: 5.98 mm
Special features: Two independent barrels
Two independent gear trains
Two constant-force remontoirs
Two independent escapement wheels
Winding & setting: Two-position winding stem:
Position 1: manual winding
Position 2: setting the time
Balance stop during setting of time
Finishing: Frosted with hand-beveled bridges, wheels with circular graining and hand-beveled spokes
Power reserve: 42 hours

Contact us

If you would like more information, would like to order a watch, are interested in our newsletter or would like to pass on suggestions to us, please fill out this contact form. Thank you for your time and interest.

Ewa Lederer, International Sales
el@ledererwatches.com / +41 32 552 17 18

Office time : 9 a.m. till 5 p.m.