7750 Movement In the history of ETA, a good core continuously: ETA-7750 formerly known as Valjoux7750, Valjoux company is the most famous timing system, and later because Valjoux was acquired by ETA, this classic Valjoux7750 will naturally change its name to ETA- 7750. The Valjoux 7750 was released in 1974 and was originally designed as a 17 stone stone and later changed to 25 stone. After the merger of the ETA in the 1980s, few people now use the term Valjoux unless it was produced before the M & A in the 1980s Those movements only use the old name. ETA 7750 on July 1, 1974 came out and become proud of ETA aircraft models, over the years common in various brands of self-winding chronograph and complex function table. The standard 7750 features 17 rubies, 42 hours of energy storage and 28,800 vibrations per hour. The 7750 is available in a one-way up-chain design using the same finger-type trimmer with the same principle of eccentric screws, with graduated instructions for fine tuning. Some people say that ETA-7750 is dead wood can not be carved. Do not know why this is said, probably from the degree of technological intentions 7750 is a little more general, but one thing is the same: simple and durable, durable is reliable. ETA-7750 is such a chronograph movement. ETA-7750 is a one-way winding movement, I do not know why ETA has never changed it to two-way. There have been some friends who came to the conclusion that "one-way ownership of higher than the two-way efficiency of the chain." Until now do not understand the theoretical basis of this conclusion is what. In fact, the problem of low efficiency of the ETA-7750 on the chain is well known to all. Sometimes it's good to introduce something new, but it's embarrassing to have nothing. The ETA-7750 uses a push-rod timing structure that is simple and easy to maintain. Aesthetically, of course, nothing compares to the beauty Lange 1001 (which is what makes SANTANA different from BENZ), but it is one of the best solutions in terms of timing. In the entire watch industry should thank the existence of ETA-7750, because with it, more watch factory can produce chronograph watch. And you can save yourself all the time to develop timing core costs. In addition, no one understands the truth: Even if you throw a lot of money into, it may not be able to come up with more durable than the ETA-7750 timing core. It is the best strategy here. How to Easily Identify ETA-7750? 6:00, 9:00, 99% of the small cap at 12 o'clock is the ETA-7750, but this can not be reversed, if a table is not 6 o'clock, 9 o'clock, 12 o'clock small Disk, can not say that 99% is not ETA-7750. It is like "Transformers", its strength is not only durable, or volatile. From 2 small cap to 3 small cap to 4 small cap, can be changed from ETA-7750. Just like IWC changed to 6 o'clock, 12 o'clock. 2892 movement Some friends have argued a question, who is the best automatic movement? Choose a lot, eventually falling on two movement: Rolex Cal, 3135 and ETA2892A2. Can not deny Rolex Cal, 3135 strong and stable, if the size of the 3135 to ETA2892A2 so who better? In this size, of course, ETA2892A2 automatic movement doing my part. ETA2892A2 is used by most high-end brands today, including IWC, OMEGA, LONGINES. Which IWC in its Aquatimer diving watch is used in the movement from the ETA2892A2. IWC not only increased the plywood grinding, but also changed the size of the balance, replaced the hairspring, and let it pass the Hong Kong Observatory certification. In fact, even if the quality of ETA2892A2 does not go through the polishing factory, just a little tuition with ordinary tuning equipment, over the Observatory certification is a trifle. It is often used by well-known mid-priced brands in higher-priced models, especially the Chronometer, and even some of the best-of-the-art brands use it, but more about polished, carved work , Or replace with K gold or pure white gold automatic plate. At the same time, 2892 is recognized by all watchmakers as one of the most sophisticated and stable models of ETA. It is equipped with a ring, 21 stones, two-way self-winding, 28,800 vibrations per hour. It has an "eccentric screwdriver" Fine-tuning. Because of good quality, as long as slightly modified, you can transform itself into a well-designed movement, even the recent popular OMEGA coaxial escapement table is also based on the 2892 plant improved to 1120, and then make a modified machine Core, in addition to the escapement different, the speed from the inside of the balance wheel to do two make-up screws, OMEGA number 2500, the number of rubies from 1120 to 27, more than 4 respectively Installed in Aberdeen, balance wheel and drive wheel (2). And as the watch of Athens (ULYSSE NARDIN) trilogy set of astronomical watches also 2892 as the basic movement, as ultra-small and complex astronomical watch, called the greatest masterpiece of the Athens table. More to mention is the OMEGA Cal 2500 / 2500B / 2500C movement, OMEGA coaxial movement is also based on the ETA2892A2 masterpiece from the change, with a non-cox hairspring coaxial escapement wristwatch Oil greatly extended the time, the coaxial will not contribute to the increase of precision, a test, the coaxial butterfly flying time accounting 12 hours after the error - 1 second. Why so much strength of the watch factory is not willing to develop a self-produced simple section of the three needle movement? If you spend too much material and financial resources produced something can not go beyond the ETA2892A2, who will be willing to do it. However ETA2892A2 also has some shortcomings, that is, the efficiency of the chain, which is the inherent problem of ETA2892A2, but through appropriate changes or can make up for this problem. For example: OMEGA Cal 1120 is automatic Tuo three screws to eccentric fixation, change automatic Tuo shape, the center down. 2824 movement is usually just the watch contact with the mechanical watch, the first movement to know or use is nothing more than ETA2824-2 and Seiko 7S26, which ETA2824-2 is not only stable, high accuracy, but also has the hand refining function, therefore Although the price is higher than the Japanese movement, but in all respects, it is still novice's first choice. Also with the ETA 2892-A2, ETA 7750 listed as ETA Sambo one (in addition to the 6497,6498 series in recent years, there is a catch-up momentum), but the pricing is much cheaper, so many fake watches and the so-called Taiwan system, The use of this movement, the result of excessive proliferation, makes many people feel resentful to hear ETA2824-2, while ignoring his excellent nature. If ETA2892A2 is to customize the high-end market, then ETA2824-2 is designed to meet the darling of the low-end market. ETA2824-2 slightly thicker than the structure of the ETA2892A2, ETA2892A2 on the chain is more simple, 3 screws fixed to a single screw. This method instead of the ETA2824-2 lack of defects on the chain. ETA2892A2 and ETA2824-2 have already occupy more than half of the Swiss automatic watch field areas, ETA and many self-produced movement in the fight for more opportunities and interests. In fact, a careful comparison of ETA2892A2 and ETA2824-2 structure, the latter is a simplified, ETA's clever lies in this - simply do not need to simply simplify the place, thereby reducing costs, driving prices lower. The final purchase which movement, totally depends on the watch factory itself. The higher level of ETA2824-2 compared with ETA2892-A2, is almost the same in all aspects, showing the ETA2824-2 performance is quite good. But its design is mass production, more or less the details of the parts and substrates, there will be criticisms of the shortcomings, but because of the factory price positioning, so most of the ETA 2824-2 appeared in the low-cost watches Column. Therefore, within a reasonable price, the use of ETA 2824-2 movement, I think table fans will also be very supportive, not just ignorant of the criticism.