The Omega Constellation series was born in 1952. At the beginning of its birth, the ‘pie’ dials and ‘curls’ have been talked about by watch lovers. The dial of the ‘pie plate’ has a very unique shape, like an inverted pan. ‘Curved ears’ mean curved lugs.
In 1968, Omega’s constellation series was replaced with an ‘abalone’ case and a pit pattern bezel, which remained very popular. The Omega Constellation Zunba watch combines the two most popular elements in the history of Omega Constellation, the ‘pie’ dial and the pit pattern bezel, impeccable from the outside to the inside.
Turning the Zunba watch’s case, you can get a glimpse into the inner movement of the watch. The coaxial movement of the Omega 8900 to the Observatory watch is engraved with the observatory pattern. In addition, it has eight stars embossed. These eight stars not only represent the eight most important accuracy records created by the Omega movement in the 1940s and 1950s, but also symbolize the eight items that this new watch must pass to obtain the Observatory’s watch certification. Testing standards.
To obtain the title of ‘Zhenzhen Observatory Watch’, it must first be equipped with the Swiss Official Astronomical Observatory (COSC) certified astronomical watch movement, and secondly must pass the test approved by the Swiss Federal Institute of Metrology (METAS). The Swiss Official Astronomical Observatory (COSC) certification has been introduced in detail in the previous article, and the so-called Swiss Federal Institute of Metrology (METAS) -approved tests will be unfamiliar to many people. Specifically, METAS is eight strict testing standards .
Test the day’s average accuracy of the watch
This is the first test that allows each watch to run for more than 4 days, simulating the accuracy of the watch under daily wear conditions. The specific operation is to first place the watch in different locations and temperature environments, then expose the watch to a strong magnetic field of 15,000 Gauss, then perform demagnetization, and finally test again in different locations and temperature environments. At each step, the watch is photographed and checked for accuracy after 24 hours relative to Universal Coordinated Time (UTC).
Operation of the Swiss Official Observatory (COSC) -certified movement exposed to a strong magnetic field of 15,000 Gauss
This test only examines the movement of the watch, placing the movement in two different positions and exposing it to a strong magnetic field of 15,000 Gauss. Each position is left for 30 seconds, and the movement of the movement is checked by sound using a microphone.
Test day average accuracy error after exposure to a strong magnetic field of 15,000 Gauss
This test is performed between the 2nd and the 3rd day after the first test and measures the average accuracy error of the watch. The results indicate the accuracy of the watch before and after exposure to a strong magnetic field of 15,000 Gauss.
How the watch is exposed to a strong magnetic field of 15,000 Gauss
This test is similar to the third test. This time, it’s not just to test the movement, but to expose the entire watch to a strong magnetic field of 15,000 Gauss, and check the watch’s operation status with sound.
The first four tests focus on the anti-magnetic aspect of the watch, and we can see the METAS standard’s emphasis on anti-magnetic detection. Anti-magnetic is also the most urgent challenge facing the traditional mechanical watches in today’s society. Magnetic fields are almost ubiquitous in life, and household appliances such as tablets, mobile phones, and even the metal buckles of belts or handbags can generate magnetic fields. Mechanical watches without innovative anti-magnetic technology, exposed to these magnetic fields for many years, will definitely affect the accuracy of the watch.
After the four anti-magnetic tests are completed, waterproof and daily simulation tests are also performed.
This test immerses the watch in water and gradually applies pressure until it reaches the pressure at a predetermined waterproof depth. Some watches are pressurized beyond the specified water resistance.
Check the watch’s power reserve and take pictures before and after the start of the expected limit. Then check all errors again to ensure that each watch is running accurately within the given time. Even if your watch is left on the bedside table for a weekend, your watch will still work perfectly.
Time-lapse error of the watch between 100% and 33% power reserve
Place the watch in six different positions, as on each side of the dice. Fully wound the watch, staying in each position for 30 seconds, and recording the average accuracy by sound. Then, the power reserve was reduced by 2/3, and it was checked again to ensure that the watch still maintained high accuracy without being fully wound.
Time error of the watch in six positions
Similar to the previous test, when the watch is placed in six different positions, check for any errors during operation, like every side of the dice. Place each position for 30 seconds and record the result via audio. By placing the watch in different positions, we can ensure that the performance of the watch remains intact no matter what the wearer is doing, sitting at the table or participating in sports.
The Swiss Official Astronomical Observatory (COSC) certification is a standard test for the accuracy of the movement, while the Swiss Federal Metrology Institute (METAS) approved tests are tests performed under daily wear of the watch and focus on antimagnetic to ensure Watch accuracy. On the premise of ensuring the accuracy of each movement, the entire watch can continue to maintain accurate movement in the daily wear of the user. This is very important for a watch. This should also be a measure of The standard of a good watch.