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What are the differences between the power system of the Jacob & Co.

Astronomia Four-Axis Tourbillon and its counterpart, the Three-Axis Tourbillon (Astronomia Revolution)? Below, we’ll clarify the differences in the power systems of the Three-Axis Tourbillon (Astronomia Revolution, or simply “Three-Axis”) and the Four-Axis Tourbillon (or simply “Four-Axis”), focusing on five key aspects: movement, mainspring, constant force, rotating platform, and winding method.

Movement Model and Basic Structure

Three-Axis (Revolution): Movement JCAM48B, 434 parts, Jacob & Co.

Structure: Three-axis tourbillon (double-axis tourbillon + platform revolution as the third axis).

Four-Axis (Four-Axis): Movement JCAM54, 485 parts.

Structure: True four-axis (three-axis tourbillon + independent fourth-axis rotating support).

Platform reduced from three arms to two arms, reducing weight and energy consumption, maintaining a 36-hour power reserve. 2. Mainspring and Power Reserve

Similarities: Manual winding, single mainspring barrel, 36-hour power reserve, 21,600 vph.

Differences mainly lie in load and torque management:

Three-axis: Drives three axes + three-arm platform, moderate energy consumption.
Four-axis: Drives four axes + two-arm high-speed platform (60 seconds/revolution), higher speed, greater instantaneous load, stronger mainspring output torque, requiring more precise constant force control.

Constant Force Device (Core Difference)

Both use 1/6-second high-frequency constant force (synchronized with the balance wheel frequency), but the design and load differ:
Three-axis (JCAM48B)
Patented “whip torque adjustment”: Releases energy every 1/6 second, buffering mainspring ripple.
Function: Protects the dual-axis tourbillon escapement, adapts to three-axis speeds (60 seconds, 15 seconds, 60 seconds). fake watch for sale

Quad-axis (JCAM54)

Next-generation high-frequency constant force: Integrated within the tourbillon frame, allowing for greater load capacity and faster response.

Suitable for quad-axis top speeds: 60 seconds, 18 seconds, 15 seconds, and 60 seconds, with the 15-second axis being Astronomia’s current highest speed, doubling the requirements for constant force stability (Jacob & Co.).

Officially described as the “fastest constant force mechanism in history,” it precisely charges and discharges every 1/6 second, offsetting the significant torque fluctuations caused by the high speed of quad-axis operation.

Rotation Platform and Power Distribution

Tri-axis: Three-arm platform, 60 seconds/revolution; tourbillon at one end, the other end containing a timer, jewel, globe, and other counterweights.

Quad-axis: Two-arm platform, 60 seconds/revolution; retains only the tourbillon and timer, eliminating the jewel/globe, reducing weight by approximately 30%, lowering power consumption, and preventing sudden power drops at high quad-axis speeds.

Winding and Time Setting Mechanism

Three-axis: Traditional crown winding + time setting (side of the case).

Four-axis: No crown; replaced by two 18K rose gold bow-shaped winding mechanisms on the case back, 180° rotating operation, suitable for a fully skeletonized design without a side crown, while also optimizing the power transmission path. best copy watch

Differences Overview (Table)

Table | Item | Three-Axis (Astronomia Revolution) | Four-Axis (Four-Axis Tourbillon)

Movement | JCAM48B (434 pieces) | JCAM54 (485 pieces)

Tourbillon | Three-Axis (Dual-Axis + Platform Revolution) | Four-Axis (Three-Axis + Independent Fourth Axis)

Platform | Three arms, 60 seconds/revolution | Two arms (weight reduction), 60 seconds/revolution

Constant Force | Whip-shaped torque adjustment | New generation high-frequency constant force (faster, stronger)

Speed | 60s, 15s, 60s | 60s, 18s, 15s, 60s (higher speed)

Winding | Side crown | Double bow-shaped winding mechanism on case back

Core Objectives | High-speed three-axis | Four-Axis + Ultimate high-speed stability

In short: The four-axis is a “power-enhanced + architecture-upgraded version” of the three-axis – using the new JCAM54 The movement, weight-reducing platforms on both arms, stronger high-frequency constant force, and crownless winding support the fourth axis and higher speeds, while maintaining a constant 36-hour power reserve. luxury moon watch

Watches & Wonders 2026: Hublot Big Bang Reloaded: Usain Bolt and Kylian Mbappé Limited Editions

At Watches & Wonders 2026, Hublot will unveil two limited-edition timepieces dedicated to Usain Bolt and Kylian Mbappé, respectively. While both watches are built on the same technical platform, their design philosophies are strikingly different.

When Hublot collaborates with its brand ambassadors to develop a watch, the final product is far more than just a special edition stamped with a celebrity’s signature. Hublot doesn’t simply print the celebrity’s name on the dial; instead, it draws inspiration from the athlete’s past experiences, incorporating these elements into the materials, colors, and details. This is evident in the two new limited-edition watches. At first glance, the two watches share the same technical foundation, but their messages are entirely different: the Big Bang Reloaded Usain Bolt and the Big Bang Reloaded Kylian Mbappé, respectively. In terms of complications, both special edition watches are flyback chronographs, powered by Hublot’s renowned in-house Unico movement, with each limited to 200 pieces.

A touch of Jamaican flair, a hint of legend, and a dash of Bolt’s humor—this is precisely why these two watches deserve our close examination. Hublot tells two distinct stories on the same platform: on one hand, it emphasizes themes of tradition, heritage, and record; on the other, it highlights confidence, ambition, and the present.

This Big Bang Reloaded Usain Bolt watch is entirely tailored to the symbolic significance of the world’s fastest man: the 44mm case is crafted from black ceramic and carbon fiber, accented with gold details, while green and yellow trim subtly echoes the colors of the Jamaican flag. When Hublot takes personalization to the extreme, the allure of the Big Bang Reloaded becomes even more pronounced: if you imagine the watch spinning, the numbers between 6 and 8 o’clock form “958”—the exact number from Usain Bolt’s 200-meter world record of 9.58 seconds. Echoing this theme, the chronograph hands are designed in the shape of lightning bolts, and the case back even incorporates the original soil from Bolt’s training ground in Jamaica. Furthermore, his motto, “Anything is possible, don’t limit yourself,” is engraved on the bezel. fashion replica watch

The Big Bang Reloaded watch doesn’t take a neutral stance; it clearly expresses its own perspective. Hublot incorporates Bolt’s career, background, and public image into the design, striving for a powerful impact. This watch boasts a bold design, meticulous attention to detail from start to finish. The Bolt special edition watch stands out with its striking symbols, strong contrasts, and design that clearly conveys its message. Even the two interchangeable straps—one a gold Velcro strap, the other a black, yellow, and green camouflage rubber strap—reflect this distinct philosophy.

It’s not a defensive watch, not even in its design.

The Big Bang Reloaded Kylian Mbappé watch presents a completely different design concept. It also boasts a 44mm diameter, but the choice of materials—polished white ceramic and 18K King Gold—creates a completely different impression: the watch appears brighter, more striking, and more modern. If the Bolt watch tells a story of heritage and record, the Mbappé watch emphasizes the spiritual aspect. Therefore, the bezel is engraved with “Trust Yourself” at 6 o’clock—a motto Hublot considers central to its sporting and public image. Furthermore, the bezel is adorned with the gold number 10, representing both Mbappé’s jersey number and his identity and lucky number. The skeletonized dial, crafted from charcoal gray ruthenium metal and accented with white, gives the watch a clean and technologically advanced look. The most significant difference between the two watches lies here. The Bolt Edition draws inspiration from history, symbolism, and a tribute to an established career. The Mbappé Edition, on the other hand, emphasizes presence, speed, and a distinctly forward-thinking image. Like the Bolt Edition, interchangeable straps are part of the Mbappé Edition’s design philosophy: a gold Velcro strap and a black and white rubber strap bearing the KM logo consistently convey the idea of self-realization, with the Mbappé serving as a role model.

However, technically, the two watches share the same fundamental structure. Both are powered by Hublot’s in-house HUB1280 Unico automatic movement, featuring a flyback chronograph function, a clearly visible gear train, and a 72-hour power reserve. Hublot places particular emphasis on showcasing the intricate structure of the Unico movement and the visibility of key components such as the gear train, clutch, and flyback chronograph. This is crucial because, even with the incorporation of various symbolic meanings and personal metaphors, these elements are precisely what give both watches their essential horological significance. This demonstrates once again that the Big Bang series serves as Hublot’s platform for creating groundbreaking works—and that technology itself is by no means insignificant. https://www.whereguidewatch.com