A watch has a soul

- Jean-Claude Biver, CEO of TAG Heuer

Just like an engine powers a car, a watch movement, also known as a “calibre” is the internal mechanism that makes a watch work. Think of it as the heart of the watch, pumping energy into all of the watch’s functions from its hands to its chronographs to make everything work in harmony. While a polished exterior is a must for any quality timepiece, it’s what’s on the inside that really counts.

AUTOMATIC MOVEMENT mobile_title_border

An automatic movement is a mechanical watch movement that operates by the continuous motion of the wearer’s wrist.


An automatic movement is a mechanical watch movement that operates by the continuous motion of the wearer’s wrist. The rotor, a half-disc metal weight, pivots freely around a spindle, and a movement in either direction helps to rewind the mainspring. Automatic watches don't need to be wound if worn every day. The watch is regulated by a spiral balance wheel that vibrates 6-8 times per second. An automatic movement is composed of more than 70 parts and up to 230 parts for the Calibre 360. While it is slightly less precise than a quartz movement (by a few minutes per month), it is the ultimate example of Swiss watchmaking expertise and tradition.


All TAG Heuer automatic movements are made in Switzerland and must meet extremely strict criteria for precision before they make it onto your wrist. Their high frequency ensures excellent mechanical precision. A number of TAG Heuer automatic movements are awarded an Official Swiss Chronometer Control (C.O.S.C.) Certificate, the ultimate recognition of precision and reliability.



We know you don’t like to take time out to recharge, so we made sure your watch can keep up. TAG Heuer automatic movements have a power reserve of about 42–48 hours, depending on the model. This means that when they are fully wound they can continue to operate for almost two days and nights without being worn. You can also rewind the mainspring manually by unscrewing the crown and pulling it out gently to position 1. Note: do not forget to screw the crown down again in position 0.



Our watches are designed to operate continuously, but an automatic watch movement does require regular maintenance to keep it in mint condition. With proper care, it will work perfectly and last for generations. TAG Heuer recommends a maintenance service every two years in addition to an annual water-resistance checkup. All watches maintainted by an official TAG Heuer service center have a one-year extension warranty.


BELT-DRIVEN MOVEMENT mobile_title_border

The patented belt-driven transmission is a high-yield relay of 5 notched micro drive-belts whose tension is controlled by 2 turnbuckles


TAG Heuer turned the watchmaking industry upside down in 2009 with the invention of the first ever drivebelt transmission. This marked a revolution in the art of watchmaking with two brand new innovations. 1. We replaced the pinions of traditional mechanical movement with a relay of five notched belts. 2. We went off track with this radical new design that blends motor racing and watchmaking. Instead of rotating, the linear weight moves up and down along a circuit of V cylinders, echoing the design of high-performance racecar engines.



The patented belt-driven transmission is a high-yield relay of 5 notched micro drive-belts whose tension is controlled by 2 turnbuckles. The transmission belts in polyether block amide have a 0.07mm section, and are 10 times smaller than any belt ever manufactured.



A second patent was granted for the innovative linear mass, replacing the classic oscillating mass. Mounted on the word’s smallest ball bearings, the 12g tungsten ingot moves up and down between 2 pairs of V-shaped barrels (hence the name V4). The barrels are angled at +/- 13 degrees, like the cylinders of a high performance racing engine.



Today’s Monaco V4 marries modernity with tradition. With its square shape and automatic chronograph, the Monaco V4 pays homage to the original Monaco series, but at the same time, its complex design clearly visible through sapphire glass in the front and back is a stylish new addition that shows how truly evolved and exciting our watchmaking has become.


The Calibre S proposes a new method of measuring and reading time by means of bidirectional systems that are mechanically independent but synchronized


We’ve always seen things differently at TAG Heuer and the Calibre S is bringing our avant-garde approach into the next generation. The Calibre S proposes a new method of measuring and reading time by means of bidirectional systems that are mechanically independent but synchronized. It’s precise, practical and elegant. It combines the meticulouosness of quartz technology with the sophistication and complexity of mechanical watchmaking. The Calibre S is the first new generation of analog timepieces to be developed in centuries and is a complex and beautiful timepiece with more than 250 components.



At TAG Heuer, our eyes are always on the road. This groundbreaking technology was inspired by sports car instruments. It uses similar bidirectional micro-motors and 160° dials. Placed at 4.30 and 7.30, they display information ranging from a perpetual calendar to 1/100th of a second.



We didn’t just invent something new – we tested it over and over again to make sure our world-shattering discovery didn’t shatter. This breakthrough by TAG Heuer required a special effort to minimize the weight of parts and materials in order to maximize precision and guarantee perfect inertia. The Calibre S underwent 12.000 hours of testing including simulated acceleration, shocks, and exposure to extreme temperatures. The road was long and hard, but TAG Heuer made no concessions in the quality and performance of the Calibre S, now fitted in the Aquaracer and Link series. The central hands display the elapsed time measured by the chronograph (hours, minutes and seconds). The two counters display the date in Time mode, and 1/00th sec. in Chrono mode.

ISOGRAPH TECHNOLOGY mobile_title_border

With its revolutionary carbon composite hairspring, the ISOGRAPH technology becomes the heart of the movement and provides a cutting-edge chronometric precision.


Always at the avant-garde, TAG Heuer unveils in 2019 a new type of hairspring, built with carbon composite. Previously made of metal, Elinvar or Silicium, the hairspring is a small spring attached to the balance wheel to form the regulating organ of the watch. Therefore, it also guarantees its precision. Patented by TAG Heuer, the hairspring is an extremely difficult element to produce and assemble. However, it nearly adapts to all movements and regulating organs with the same efficiency. Requiring the manual intervention of 4 watchmakers, the ISOGRAPH technology has been integrated into the Heuer 02 Tourbillon house movement, combining two extraordinary elements. TAG Heuer thus confirms the full extent of its savoir-faire.



Key element in the operation and precision of a watch, the hairspring is also essential in terms of time measure. An area in which the ISOGRAPH technology offers very high performances, thanks to a custom-made balance wheel and a carbon composite hairspring more resistant than ever. Models featuring the ISOGRAPH technology are all certified chronometer by the COSC.



Chosen by the TAG Heuer institute to manufacture its new hairspring, carbon has replaced metal, Elinvar and Silicium. Lightweight, shock resistance, stability, anti-magnetism, optimal thermal behavior: its numerous advantages provide unique performance and improved accuracy.


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