![cronometer logo cronometer logo](http://cdn.onlinewebfonts.com/svg/img_7367.png)
“Officialy Certified Chronometer” on back
![cronometer logo cronometer logo](https://thumbs.dreamstime.com/b/chronometer-icon-vector-isolated-white-background-chronometer-transparent-sign-black-time-symbols-chronometer-icon-vector-134150530.jpg)
The following list contains only models with mechanical movements. In comparison, this makes any chronometer model, for example, from Omega or Rolex seem like a mass-production item. Watches that pass the seven testing requirements are issued a physical certificate with specific test results. Not surprisingly, these models are hard to find nowadays.
#Cronometer logo serial number#
The movement has a unique serial number which must match the one on the case back. A counter chronometer is described which measures time intervals up to 12.75 microseconds by counting the oscillations of a 20 Mc/s free-running oscillator. All with the 25-65 movement (without date) or 25-651 (with date). Create your own chronometer logo in just a few clicks and without any help Using DesignEvo logo maker you can make a professional chronometer logo for free. From 1960 to 1971, only 8821 mechanical chronometers were produced at Certina. Inside the Rolex box (left) the logo and crown are silk-screened on the lower right. I guess they all had the 28-45 movement inside. The chronometer seal that comes with each Rolex is also duplicated. But before 1960, fewer than 500 watches with COSC certificate were sold. In 1916, for the first time, watches from the factory of the Kurth brothers were sent to Biel to the “Bureau Officiel de Contrôle de la Marche de Montres” and were successfully tested. After passing the test, the movement receives a certificate which validates its accuracy rating. If the movement receives the COSC certificate, the manufacturer usually labels the watch with the word “Chronometer” or the French “Chronomètre”. Before the COSC’s founding in 1973, the audit was performed by various private and semigovernmental laboratories.
![cronometer logo cronometer logo](https://static.vecteezy.com/system/resources/previews/000/652/751/original/vector-chronometer-icon-image.jpg)
#Cronometer logo iso#
The Swiss movement of a watch must pass a 15-day endurance test (in accordance with NIHS 95-11 / ISO 3159) conducted by the independent Swiss observatory Contrôle officiel suisse des chronomètres (COSC), in order for it to be entitled to use the name official chronometer. In the past, these were needed for timing and navigation on vessels and aircrafts. NationalAverage Ratings 3 out of 5 Stars, 1 Reviews(1) Cronometer Logo. The term “Chronometer” (from ancient Greek chrónos “time” and métron “measure, measuring stick”) indicates highly precise watches.