Chronometer - The most sought-after
Timepieces with the designation "Chronometer" are wristwatches that have been certified by an independent organization to meet strict accuracy standards. The most well-known certification organization for chronometers is the Swiss Official Chronometer Testing Institute (COSC), which was founded in 1973.
To earn a COSC chronometer certification, a watch must undergo rigorous testing in various positions and temperatures, resisting those obstacles over a period of several days. The testing process includes exposing the watch to 5 different positions, including horizontal, vertical, and at a 45-degree angle while enduring three different temperatures between -8 to 38 degree celcius to test its precision over a period of 15 days.
The accuracy of a chronometer is measured in seconds per day, with a maximum allowable deviation of -4 to +6 seconds. This level of exactness is achieved through the use of high-quality materials and precision engineering, including regulated movements and finely-tuned balance wheels.
Chronometers have a long history of use in the fields of aviation and navigation, where accurate timekeeping is essential. In the early 20th century, timepieces with this certification were used by pilots and navigators to determine their exact position and calculate flight times. Today, chronometers are used by a wide range of professionals, including scientists, engineers, and athletes, who require accurate and reliable timekeeping.
Wristwatches with integrated chronometers are highly sought after by watch enthusiasts and collectors alike for their precision and reliability. They are often more expensive than non-chronometer watches due to the extra testing and quality control required to achieve certification. However, for those who value accuracy in their timekeeping, a chronometer is a worthwhile investment.
By having a watch with chronometer certification adorning your wrist, you set an example to your surrounding by investing in a product second to none in style and precision. But especially household names like Rolex go the extra mile by holding their timepieces to even higher standards, as models in the Oyster line are guaranted since the 1950's to deviate by no more than 2 seconds per day, thereby holding your vintage to exactly the same high standard.
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