For the Only Watch 2023 charity event, independent Swiss master watchmaker Bernhard Lederer has created a unique version of the Central Impulse Chronometer. Adorned with Only Watch 2023 colors, this timepiece doesn’t have a dial, and the imposing movement is completely exposed under the crystal.
This one-of-a-kind wristwatch also marks the return of the great watchmaker to Only Watch after 12 years. The last time one of his creations was offered at this famous auction was in 2011.
In 2020, Bernhard Lederer introduced the Central Impulse Chronometer watch with a revolutionary mechanical movement that incorporates two constant force winding mechanisms and mirrored chronometer escapement with central impulses.
Equipped with the patented escapement mechanism developed by Lederer, Central Impulse Chronometer offers extraordinary chronometric performance and outstanding frequency stability, as certified by the Besançon Observatory and the COSC (Contrôle Officiel Suisse des Chronomètres).
The one-of-a-kind Central Impulse Chronometer created for Only Watch 2023 reveals Lederer’s ingenious invention with a major first. Instead of a dial, an entire movement is fully exposed, without the slightest portion of it hidden from view.
The entire movement, including the bridges and main plate, is treated with a black diamond-like coating. It also maintains some emblematic fine watchmaking finishes, such as satin-finished, sand-blasted, brushed surfaces and polished angles.
The Central Impulse Chronometer movement boasts a dozen sectors in vivid colors generated with a Super-LumiNova® coating – they reflect the 2023 Only Watch color chart, with vibrant blue, pink, yellow and green, among others. They also make the letters forming the word “SIX” at 6 o’clock and “TWELVE” at 12 o’clock pop.
The case back of the watch depicts a very modern abstraction of Swiss landscapes, between lakes, mountains and urban backdrops – interlacing colors and spatial volumes, boldly applied marquetry, each surface given its own grain, defining it in space and capturing light in its own way.
Technical details
Model: Bernhard Lederer Central Impulse Chronometer Only Watch 2023
Reference CIC 9018 – Only Watch 23
Case
Stainless steel, black DLC treatment, Super-LumiNova® coating with Only Watch 2023 colors
Diameter: 44 mm
Thickness: 11.5 mm
Case back: Open with sapphire crystal, anti-reflective coating
Water resistance: 3 ATM
Dial
No dial
Movement
Mechanical hand-wound
Number of components: 220
Number of jewels: 46 jewels
Frequency: 21,600 alternations/hour (3 Hz)
Diameter: 39.3 mm
Thickness: 5.98 mm
Power reserve: Minimum 38 hours
Special features
Double barrel
Two independent gear trains
Two constant force winding mechanisms
Mirrored chronometer escapement with central impulses
Variable inertia balance with eight inertia weights
Breguet balance spring with terminal curve
Finishes
The components are decorated on all sides
Fine satin-finishing, top and bottom hooping, bead-blasting, hand-polished inside corners; bridges and plate straight-grained and beveled by hand on both sides
Super-LumiNova® coating with Only Watch 2023 colors
Functions
Hours, minutes
Strap
Multi-colored with original Only Watch 2023 motifs
