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As a wrist watch collector ( and a private pilot ) I most humble contest those who say that a mechanical watch does not fill the bill for us - pilots! A very high quality mechanical watch ( with C.O.S.C. certificate ), can deliver a "knowing daily rate", capable of targeting the time within 2 to 3 seconds a month for those who indeed need such an acccurate time ?! Who need such ? Pilots or astronauts ? For those seeking for accuracy I recommend thermo compensated quartz watches such as Piquot Meridien wrist marine chronometer or one of those radio controled ( several brands ). Good fligths. Vanildo Maldi