The Silent Accord: Review of the Grand Seiko Spring Drive Diver SBGA229
Grand Seiko's SBGA229 diver's watch combines traditional mechanical watch making techniques and electronic timing functions. The replica Grand Seiko Spring Drive technology developed by Seiko makes this possible, and the result is an authentic diving watch with a unique inner life. We went through this feature in the WatchTime archive and Olaf Köster's original photos.
Grand Seiko stands at the forefront of the Japanese watchmaking industry. A unique Spring Drive technology is considered to be the best product Seiko has ever produced. Therefore, this innovation joins the Grand Seiko series, which makes sense, the history of the series can be traced back to the 1960s, and its form follows function. The combination of mechanics and electronics seemed perfect, but it took several years to integrate Spring Drive technology into Seiko's exclusive product line.
Seiko introduced the Spring Drive technology in 1999, but due to the lack of a sufficiently effective automatic winding system, the power reserve time was short, which initially prevented the brand from integrating the technology into Grand Seiko. Several years of further development finally launched the 9R spring movement in 2004. Our test table is equipped with a 9R65 version, which shows the date and remaining power reserve. Its automatic winding system relies on a magic lever: Seiko originally developed this ratchet winding system in 1959, which subsequently improved efficiency, simplified maintenance and extended durability. The power reserve has been extended from 48 hours for a manually wound movement to 72 hours for an automatic movement. The 9R65 movement is now the most widely used 9R Spring Drive movement among the Grand Grand Seiko models. Its development is possible because Seiko has the necessary expertise in the mechanical and electronic fields.replica Breitling Professional Watches
Spring drive for high precision The spring driver combines the traditional spring power of a mechanical movement with the latest electronic equipment that does not require batteries or any other external energy sources. The movement generates energy in a traditional way, making the watch completely independent of external power sources. The mainspring provides power at one end of the gear train. The other end of the conventional escapement is replaced by a regulating system, which generates a small amount of electric charge, which activates the quartz oscillator. Instead of the escape wheel, the sliding wheel rotates uniformly on the electromagnetic coil, thereby generating electric current, which is conducted to the integrated circuit (IC) and the quartz crystal. When the quartz vibrates at a constant frequency, the IC calculates the required electromagnetic pulse, which adjusts the speed of rotation of the sliding wheel, thereby adjusting the speed of movement. Unlike the escape wheel, the sliding wheel is not subject to mechanical intervention, so there is almost no loss of power due to friction. Therefore, Spring Drive has much higher accuracy than mechanical escapements. The average deviation calculated by Seiko is 0.5 seconds per day, with a maximum of 15 seconds per month. The deviation we measured on the wrist every day was 0.1 second. After half a month, our test watch added 2 seconds.replica swiss watches
Spring Drive uses quartz technology to adjust the operation of the mechanical movement, so as to obtain higher precision than a purely mechanical movement. This precision is attributed to the Tri-synchro regulator system, which converts the mechanical energy of the clockwork into the electric current of the integrated circuit and the quartz crystal. While the crystal oscillates uniformly, the IC adjusts the speed of the watch by applying pulses to the sliding wheel.
The silent second hand indicates the second The sliding wheel rotates clockwise 28,800 times per hour. This speed corresponds to the number of half-vibrations completed by the balance wheel per hour in modern mechanical movements. However, unlike the escape wheel, the gliding wheel does not stop and release repeatedly, so the second hand moves smoothly around the dial instead of moving forward step by step. Of course, there is no typical ticking sound, but the silent sliding of the second hand makes Spring Drive's time display unique.Best replica watches
When the second hand is short, a luminous point slides over the dial. The luminosity and stable rotation of this point are especially important during diving, because they can ensure that the wearer's watch is still running. The hour and minute hands are also equipped with Lumibrite, a luminous paint developed by Seiko. These hands can be clearly distinguished, because everyone has their own unique shape. With multi-faceted luminous decals, they can provide the best readability under all lighting conditions where Seiko's dive watches are renowned.
During the day, the strong black and white contrast under the anti-reflective sapphire crystal undoubtedly proves the time. The power reserve display at 8 o'clock is somewhat unusual: as the power in the mainspring decreases, the hands of the display gradually slide from the bottom of the 90° arc to the top. When the mainspring is fully tightened, the pointer points to the white part at the bottom of the arc, but if the white part is used instead of the white part, the power reserve display will be easier to understand, that is, the gray part of the arc at the critical stage of power reserve decline , And then the black part. The date at 3 am is easy to read: the indicator switches one hour before midnight, and then jumps to display the date of the next day shortly after midnight. After the crown is pulled out to the middle position, it can be adjusted manually by rotating the crown.replica Bell & Ross BR 05 watches
Professional diving watch According to the diver's watch, the crown is strong, knurled, can be tightened, and can prevent side impacts. The crown is easy to operate in any situation. The unidirectional rotatable diver's bezel is also easy to use. It clicks into place smoothly in half-minute increments, is marked and calibrated almost every minute, and affixed to the Zaratsu polished case specially made by Seiko Shinshu Watch Studio. Here, by gently pressing the stainless steel shell on the rotating grinding disc, it is manually polished to a high gloss. The bezel is set with titanium carbide, which is a particularly hard and shatter-resistant titanium and carbon composite material. The ergonomic angle and notched edges of the diver's bezel ensure a firm grip. Last but not least, the case has a pressure resistance of 20 bar and is tightly sealed by a huge screw back cover decorated with the Grand Seiko Lion emblem.
An unfolding buckle with a hinge on only one side is a technical highlight. In addition to the side button and safety bow used to open the closure, the buckle also integrates an extremely powerful extension mechanism. The wearer can easily unlock the safety device without opening the clasp, and can increase the length of the bracelet by more than three centimeters. The expansion process proceeds step by step through 14 locking points. Simply push the bracelet back to the clasp to shorten the bracelet again. Like the entire stainless steel bracelet, the clasp is very soft and feels very comfortable on the wrist.replica Patek Philippe Grand Complications Watches
Grand Seiko Spring Drive Diver SBGA229 is close to Rolex's elite company (the dateless Oystersteel Submariner), and is higher than Omega's Seamaster Diver 300M stainless steel version. These Swiss brands provide pressure resistance of more than 100 meters, and in Omega, they are more resistant to magnetic fields. Although Seiko has a unique technology of the motor core, Seiko watch factory must still work hard to maintain its position in such a competitive environment.
glasses Manufacturer: Japan Shiooji Shinshu Watch Studio Seiko Epson Corporation Reference number: SBGA229 Functions: hours, minutes, central seconds, date, power reserve display, unidirectional rotatable diver's bezel Movement: Calibre Seiko 9R65A based on Calibre 9R Spring Drive, 28,800 vph (sliding wheel), 32,768 Hz (quartz oscillator), 30 jewels, Diashock damping, fine adjustment using Tri-synchro regulator system, 72-hour power reserve , Diameter = 30.0 mm, height = 5.10 mm Case: Hardened stainless steel, titanium carbide bezel on the top of the bezel, sapphire crystal, anti-reflective coating on the bottom of the case, strong bottom cover, waterproof to 200 meters Bracelet and clasp: Hardened stainless steel, push-button deployment clasp with safety and extension device Scoring results (deviation in seconds per 24 hours): Average rate: wearing test +0.1 Dimensions: diameter = 44.23 mm, height = 14.12 mm, weight = 204 grams