Engineering Precision: The Breguet Expérimentale 1 In Detail
Breguet’s legacy is defined by innovation—from the invention of the tourbillon to advances in shock protection and high-precision mechanisms. With the introduction of the Expérimentale 1, the manufacture once again demonstrates its commitment to pushing horological engineering forward. This new creation combines magnetic technology, a high-frequency escapement, and an adaptive tourbillon into one of the brand’s most technically sophisticated watches yet.
A Magnetic Architecture Designed to Reduce Friction
At the center of the Expérimentale 1 is a balance assembly that replaces traditional contact surfaces with a carefully calibrated magnetic structure. In a conventional balance staff, jewel bearings support the oscillating organ, and even though these bearings generate minimal friction, they still rely on physical contact. Breguet reimagines this construction by eliminating the upper bearing collar and using two opposing magnets to maintain the balance staff in perfect alignment.
This configuration reduces friction dramatically, allowing the balance to oscillate with greater freedom, improving the movement’s efficiency and decreasing wear on components. Because energy loss is minimized, the design supports the extremely high 10 Hz (72,000 vph) operating frequency that defines the performance of this movement.
A Tourbillon Built for High Frequency
The Expérimentale 1 incorporates a tourbillon specifically engineered to function at this 10 Hz rhythm, a remarkable achievement in modern watchmaking. Almost all tourbillons operate at far lower rates, typically around 2.5 Hz, because increasing the frequency places substantial demands on both materials and energy. Breguet addresses the technical challenges by using non-magnetic materials such as silicon in key components, ensuring that the magnetic architecture does not interfere with the regulation of the tourbillon.
High-frequency tourbillons require stable torque to maintain accuracy. When the mainspring approaches the lower end of its power reserve, torque naturally decreases, which can affect the performance of the tourbillon. To counter this, Breguet equips the Expérimentale 1 with a mechanism that decouples the tourbillon when torque drops below an optimal threshold. This allows the watch to maintain stable timekeeping even as available energy diminishes.
The result is a system that behaves much like a constant-force device, preserving amplitude and accuracy. According to Breguet’s own internal standards, the movement achieves what it categorizes as “scientific” precision, corresponding to a performance target of approximately ±1 second per day.
To sustain the demands of the high-frequency escapement and the tourbillon, the Expérimentale 1 uses a patented twin-barrel configuration arranged over two levels and connected in series. This architecture ensures an even, stable flow of power throughout the movement. The result is a long and reliable 72-hour power reserve, impressive given the amount of energy required to maintain a 10 Hz tourbillon.
Despite its technical complexity, the movement remains manually wound, and the extended autonomy ensures that the watch can rest through an entire weekend without stopping.
A Technical Dial With Deep Architectural Layers
The front of the watch takes the form of a three-level mechanical display, emphasizing visibility of the movement’s architecture. The Expérimentale 1 uses a regulator-style layout in which the tourbillon at 12 o’clock also serves as the seconds indicator, the central hand displays the minutes, and the hours appear on a separate subdial positioned at 6 o’clock.
The dial structure blends blued components with rose gold plates, polished screws, and visible rubies, while white enamel rings create a clear visual framework for reading the time. The composition introduces depth and dimension, allowing each mechanism to maintain a distinct visual presence.
A Modern Interpretation of Breguet’s Marine Aesthetic
The watch is housed in a 43.50 mm case crafted from Breguet’s proprietary 2025 gold alloy. While the design draws from the Marine collection, certain elements—especially the sharply faceted lugs—give the Expérimentale 1 a more contemporary and technical appearance than the brand’s traditional offerings.
The exhibition caseback reveals a symmetrical arrangement of components, decorated with frosted surfaces and precise finishing standards that align with Breguet’s commitment to haute horlogerie craftsmanship.
Limited Edition
The Breguet Expérimentale 1 is produced in a limited series of 75 pieces, priced at CHF 320,000.
Our Take
While the watch’s technical spectacularity clearly takes center stage, it does not lose the identity that has defined Breguet’s 250 series. Viewed with the right perspective, its design and mechanics reflect the essence of the brand. Its complexity may feel overwhelming for a layperson—and at times even for seasoned collectors—and reading the time can be challenging, yet the brilliance of the watch shines through, rewarding those willing to explore its intricacies.
More information at www.breguet.com.
General Specifications:
Brand: Breguet
Model: Experimentale 1
Reference: E001BH/S9/5ZV
Dial: Openworked
Case Material: 18k Breguet gold
Case Dimensions: 43.50 mm Diameter, 13.30 mm thickness
Crystal: Sapphire Glass
Case Back: Sapphire Glass
Water Resistance: 100 Meters
Strap: Blue rubber strap with a 18k Breguet gold pin buckle
Caliber: 7250
Dimensions: 33.80 mm Diameter, 6.30 mm thickness
Functions: Hours, minutes, seconds by tourbillon
Winding: Hand wound
Frequency: 10 Hz (72,000 Vph)
Jewels: 37
Components: 266
Power Reserve: 72 Hours
Price: CHF 320,000
Limited Edition: Yes, 75 pieces
