To date , Rolex still holds the record for the most certified chronometer movements in the category of wristwatches .
In 2005 , more than half the annual production of COSC certified watches were Rolexes .
To date , Rolexes still holds the record for the most certified chronometer movements in the category of wristwatches .
In 2005 , more than half the annual production of COSC certified watches were Rolexes .