Itt tudod bővíteni hiányos ismereteidet:
https://blog.crownandcaliber.com/what-is-the-difference-between-a-chron…
"If a watch is referred to as a chronometer, it has passed intense precision tests over a 15-day period and has obtained an official rate certificate from the COSC, which is the Official Swiss Chronometer Testing Institute. These tests measure the movement of the watch towards a set of accuracy. In order to receive this certification, the watch must remain within +6 and -4 seconds per day. If a watch is referred to as a chronometer, it is a superior timekeeper and is very accurate. If a watch has received this achievement, it usually has “Chronometer” displayed on the dial."
A "superlative chronometer" pedig azt jelenti, hogy nemhogy csak a COSC-követelményt teljesíti, de a gyártó azt még egy felsőbb szintre (superlative) emeli. Ez a Rolex-nél a napi átlag +-2 sec-et jelenti. Ez a minimum, amit tud. Ez egyébként lehet +- 0 sec is.
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trey @ gépház