Since Christiaan Huygens first paired the balance wheel and spiral spring in 1675, the hairspring has remained the heartbeat of every mechanical watch. Its material has always been the key to determining the precision of timekeeping. Steel, which dominated for centuries, faced issues like magnetism and temperature fluctuations. The 20th century saw the introduction of special alloys - Elinvar, Nivarox, and Parachrom - each improving reliability. By the late 1990s, silicon emerged as a favored material, prized for its resistance to magnetism and its lightweight nature. Yet, silicon is not without its drawbacks. It is brittle and relies on external suppliers, creating a dependency that many brands wish to avoid. Enter the replica TAG Heuer TH-Carbonspring - an innovation born entirely in-house, marking a bold step forward in horological technology. Though this technology isn't entirely new to watch enthusiasts, 2026 marks its full-scale readiness for commercial production. What began nearly a decade ago at TAG Heuer's dedicated research lab has now reached the pinnacle of success. A Journey from Concept to Reality The journey to develop the TH-Carbonspring began with a clear goal: to create a hairspring that could combine the best properties of past materials while overcoming their inherent limitations. Early prototypes were tested in 2019 with the Carrera Heuer 02T Nanograph tourbillon, which demonstrated the spring's resilience and precision. That same year, TAG Heuer also attempted to integrate the carbon hairspring into the Autavia Isograph Chronometer, pairing it with Sellita's Calibre 5 movements. However, production challenges forced a return to traditional springs. Nevertheless, these early experiments showcased TAG Heuer's resolve to find an alternative to silicon - an alternative that could bypass the patent restrictions shared by industry giants like Swatch Group, Rolex, Patek Philippe, and Ulysse Nardin. The breakthrough came with the 2021 Carbon Monaco for Only Watch, where a Heuer 02 chronograph was fitted with a refined version of the carbon hairspring, proving the technology's long-term viability. This success led to the industrialized TH-Carbonspring, now ready for full-scale production. The Science Behind the TH-Carbonspring Unlike metal or silicon, the TH-Carbonspring is grown through a Chemical Vapour Deposition (CVD) process. Carbon nanotubes are cultivated in a controlled environment and then infiltrated with amorphous carbon to stabilize the structure. This results in a lightweight, homogeneous spiral with remarkable strength and resilience. Crucially, the collet - the small but vital component that connects the spring to the balance staff - is formed during this growth process, eliminating the risk of errors in the assembly stage. Each batch of springs undergoes meticulous refinement, ensuring consistent thickness, geometry, and heat treatment to guarantee optimal performance. This is a true feat of precision engineering, as the entire process occurs within TAG Heuer's own facilities, free from external suppliers. The result is a carbon hairspring that rivals the benefits of silicon, without the dependency on protected patents. Performance Upgrades: Precision, Durability, and Stability The TH-Carbonspring delivers three key advantages over traditional materials. First, it is immune to magnetic interference, meaning it's unaffected by everyday magnetic fields that often disrupt a watch's accuracy. Second, its shock resistance is unparalleled. In laboratory tests, while steel springs bend and silicon fractures under impacts of up to 5,000 g, the carbon spring remains intact. Third, its lower mass reduces inertia, improving the movement's isochronism and stability, particularly when the watch is in different positions. Together, these attributes ensure superior chronometric stability and reliability, regardless of the environment. TAG Heuer has also addressed the issue of material porosity, ensuring that humidity does not affect the carbon spring's performance. After years of testing and refinement, the TH-Carbonspring is now validated for large-scale production, offering watch enthusiasts a durable, precision-engineered alternative to silicon. TAG Heuer's Iconic Models: Monaco and Carrera with TH-Carbonspring TAG Heuer's commitment to the TH-Carbonspring's development is reflected in two of their most iconic models - the Monaco and the Carrera. Both fake watches now feature this groundbreaking technology, marking a new chapter in TAG Heuer's storied legacy. TAG Heuer Monaco Flyback Chronograph TH-Carbonspring The Monaco Flyback Chronograph TH-Carbonspring is a stunning blend of tradition and innovation. Housed in a 39mm forged carbon case with a thickness of 14.1mm, it retains the bold square geometry of the 1969 original while benefiting from the strength and lightness of carbon. The carbon dial is engraved with a spiral pattern that mimics the geometry of the hairspring, reinforcing the watch's technical prowess. The watch features a chronograph with three sub-registers at 3, 6, and 9 o'clock, with the running seconds at 6 o'clock almost invisible, a subtle nod to the advanced mechanics inside. The watch is powered by the new COSC-certified Calibre TH20-60, an automatic flyback chronograph with an impressive 80-hour power reserve, all regulated by the TH-Carbonspring oscillator. Limited to just 50 pieces, the Monaco Flyback Chronograph TH-Carbonspring is priced at CHF 17,000 and will be available from December 2026. TAG Heuer Carrera Chronograph Tourbillon Extreme Sport TH-Carbonspring For those seeking even more mechanical sophistication, the Carrera Chronograph Tourbillon Extreme Sport TH-Carbonspring is the ultimate statement of performance and precision. This 44mm forged carbon replica watch features a tachymeter bezel crafted from the same material, housing a flying tourbillon integrated with TAG Heuer's latest chronograph movement. The black opaline sub-dials at 3 and 9 o'clock maintain a familiar layout, while the exposed tourbillon at 6 o'clock adds an element of visual drama. The dial's spiral engraving once again references the geometry of the TH-Carbonspring, while rhodium-plated indexes and faceted hands coated in Super-LumiNova ensure excellent legibility. The Calibre TH20-61 inside features a column-wheel chronograph design and offers a 65-hour power reserve. Water-resistant to 100m, it is secured by a black rubber strap with a DLC titanium folding clasp. Limited to just 50 pieces, the Carrera Tourbillon Extreme Sport TH-Carbonspring is priced at CHF 40,000 and will be available in early 2026. To know more about read the info here