In 1858, Petrini was accepted as a student i mechanics under Chronometer watch maker S�derberg.
2.
During the same period, between 1779 and 1782, Arnold finalized the form of his chronometer watches.
3.
A "'chronometer watch "'is a watch tested and certified to meet certain precision standards.
4.
More recently, the term has also been applied to the chronometer watch, a watch that meets precision standards set by the Swiss agency COSC.
5.
In addition to the Marine Chronometer watches Omega also developed a Marine Chronometer clock using an advanced 4.19 MHz quartz resonator giving an unparalleled accuracy of less than 5 seconds per year under calibre 1525.
6.
A chronograph is a watch with an added duration timer, often a stopwatch complication ( as explained above ), while a chronometer watch is a timepiece that has met an industry standard test for performance under pre-defined conditions : a chronometer is a high quality mechanical or a thermo-compensated movement that has been tested and certified to operate within a certain standard of accuracy by the COSC ( Contr�le Officiel Suisse des Chronom�tres ).
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