Superlative Chronometer Officially Certified
The Swiss official chronometer testing institute, Code Officiel Suisse des Chronomètres, awards the chronometer certification to high-precision watches (COSC). Only after passing accuracy testing at the COSC may a timepiece be labelled as a chronometer in Switzerland. A Chronometer is a high-precision timepiece in the consumer's perception. This subject relates indirectly to, but is also directly relevant to, the previous one: how much does it cost to get a Rolex Air King serviced?
Hans Wilsdorf, the founder of Rolex, committed his life to eliminating all areas of wristwatch weakness and prioritising precision. Visit Rolex service costs UK dedicated article for more details. Rolex produced over 90% of all COSC-certified chronometers by the early 1950s.
The wrist watch must be accurate within +6 and +4 seconds each day in order to be COSC certified. The test criteria are in line with ISO 3159's definition of a spring balance oscillator wrist chronometer. The watch movements are tested for fifteen days at three different temperatures in five distinct postures. With the use of a webcam, daily magnitude is captured. Based on these measurements, seven elimination criteria are calculated, and each must be met. You may also be interested in reading about the following subject: how long does the automatic movement on a Rolex last?
Chronometers certified by COSC must have spring driven escapements. Often, other advances are added to chronometers to increase their accuracy and efficiency. Physicochemical properties of rare metals like gold, platinum, and palladium are used in the manufacture of chronometers such as Rolex to improve accuracy. Jewel bearings made of rubies and sapphire are used to reduce friction and wear on the pivots and escapement. Temperature-induced changes in the elasticity of the balance spring are corrected for by the mechanism built into it. If you're especially seeking for information about buying a Rolex on amazon, we could have it.
What is the year of Rolex's Superlative Chronometer Officially Certified? The Rolex Superlative Chronometer Officially Certified designation was introduced in 1951, indicating that it met and exceeded COSC standards.
With the addition of a second round of testing and fine-tuning, Rolex took COSC chronometer certification to a whole new level. After the wrist watch movement has been certified by COSC, Rolex will fine-tune it to achieve a -2/+2 seconds per day accuracy. Rolex refers to this level of precision as a 'Superlative Chronometer Officially Certified'. Officially Certified Superlative Chronometer is still a term on Rolex watch dials. Rolex Milgauss watches are twice as accurate as a COSC chronometer.