Here a profile on the Heuer-02 from Uhren Kosmos. https://www.uhrenkosmos.com/tag-heu...ibre-heuer-02-erstmals-ein-manufakturkaliber/ Disclaimer Translation to English by Google ================================== The TAG Heuer Monaco Caliber Heuer 02 offers for the first time a manufactured movement The history of the Heuer "Monaco" dates back to the year 1969. At that time, the chronograph with the micro-rotor module caliber 11 came onto the market. He came from a cooperation of Büren and Dubois-Dépraz. In the square steel case of the new "Monaco Caliber Heuer 02", there is an in-house manufactured automatic caliber with ratchet chronograph. THE WAY TO CALIBER HEUER 02 In the long, turbulent history of Heuer and TAG Heuer 2010 has a special significance. This year the company started the way to becoming a true manufacturer. Not entirely voluntarily, as can be stated retrospectively, but triggered by restrictions of the Eta , the hitherto most important supplier of works. Because a new movement traditionally does not arise overnight, however, the planning and development work began years before. Time also does not respect or perhaps precisely in the business of precision watches nothing that was created without it. This finding applies in particular to chronographs, Even though it may not seem so superficially, those time writers are technically challenging the watchmakers in a special way. With rear derailleurs of this caliber to stop more or less long time intervals, the devil is in the detail. Especially when a movement à la Caliber Heuer 02 , which was initially called TAG Heuer in 1969, is to be produced in larger quantities. The use of modern computers does not change that either. That's exactly what happened to the developers of this automatic caliber. Computers can seemingly perfectly simulate functional processes. In the end, however, reality always determines the success of planning. DEVELOPED FOR GOOD REASONS Several aspects spoke in favor of the development of a new Caliber Heuer 02 caliber : With 7,13 millimeters built the somewhat aged, because on the 1997 presented Seiko TC 78 based caliber Heuer 01 with ball bearing rotor , ratchet wheel control and swing drive builds relatively high. Because of the vertical arrangement of the two counter pointers, the distinction between the well-known Valjoux / Eta 7750 and the clone named Sellita SW 500 is relatively difficult. A traditional chronograph look, as you know it from classics like Autavia, Carrera, Monaco or Monza , can therefore not be achieved with this movement. Finally, based on traditional principles construction relatively long assembly times, which is reflected in the cost. On the left side, the caliber 1887 or Heuer 01, which is based on a Seiko tube, and on the right, the caliber 1969, as a pre-blaster of the caliber Heuer 02 TRIAL AND ERROR Under these premises, the development team of TAG Heuer set out for the new plant. The goal was a chronometer caliber with a diameter of 31 millimeters that was as robust as it was reliable and cost-effective to produce . The 6.5-millimeter height was based on the El Primero sister Zenith . Meanwhile, the flat construction of the caliber emerged in 1969 as one of the Achilles heels. It caused a thin chronograph bridge, which was rather inadequate for everyday use. The initially baptized CH-80 and 1969 because of its 80-hour gait autonomy had no flyback function . In an attempt to zero the running chronograph without prior stopping, the stable neutral lever deformed said chronograph bridge. Because she had to give way to a more powerful execution, the overall height of the movement climbed by 0.4 to 6.9 millimeters. Further, after urgent optimization, the elevator and hand positioning system also required because not sufficiently deep intermeshing gears caused clicking sounds when the hands were pointed. A modification also experienced the semaphore date switching , which then acted much more precise. TAG Heuer works production in Chevenez OPTIMIZED IN THE FUTURE Moving the date wheel to the next day takes about 20 minutes. Thanks to the clever design, nothing happens if there is additional manual intervention during the shifting process. In this case, the system is blocked, the date must be manually indexed using the half-drawn crown. Incidentally, the voluminous barrel is also found on the front of the caliber Heuer 02 . Savvy watchmakers can replace it in just ten minutes without disassembling the rear-mounted automatic and chronograph assembly. The stored energy storage unit tensions a centrally positioned ball bearing rotor rotating over the entire movement . After intensive considerations, the designers then deliberately opted for a one-sided self- winding with ratchet wheel . The absence of a change gear to polarize the rotor movements saves on the one hand height and parts, on the other hand does, as the elevator performance of the caliber Heuer 02 proves, the efficiency not the slightest demolition. TAG Heuer is cooperating with the specialist AtoKalpa for the four-hertz vibration and escapement system . Assuming appropriate regulation, the precision of the entire oeuvre basically meets the requirements of COSC . THE CALIBER HEUER 02, ITS PARTS AND ITS FUNCTION SOPHISTICATED DESIGN At the stop mechanism, the filet piece of the TAG Heuer caliber Heuer 02 tradition and innovation go hand in hand. The old version represents the control wheel for controlling the functions start, stop and zero position. Incidentally, apart from the chronograph bridge, it is the only component that is fastened to the motherboard with a screw. All other components, including the stamped start / stop, blocking and zeroing levers and the holding and compression springs, are simply plugged together or hung. Your task or other parts will keep you in the right position. The absence of screws reduces the assembly time by about 50 percent without affecting the function. In this case, the connection between the movement and the chronograph does not produce an oscillating drive , but rather a friction- free friction clutch.More about how a friction clutch works can be found here in the watch cosmos. All in all, each copy of the TAG Heuer caliber Heuer 02 only requires 233 parts . For an automatic chronograph with 30-minute and 12-hour counter are surprisingly little. Here, TAG Heuer, with the pilot and poet Antoine de Saint-Exupéry , who many decades ago stated that perfection does not come from not being able to add anything, but when there is nothing left to take away. Quite apart from that, present at the customers' wrist can not be any problems already. Less is clearly more in the case of the caliber Heuer 02.