Rado Anatom 10.366.76.1, Инструкция по эксплуатации

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Chronomètres, COSC). This neutral and
independent body individually tests each
movement for 360 consecutive hours,
during which it is placed in the five common
wrist positions and exposed to three
different temperatures. To earn the title
of chronometer, the mechanical movement’s
average variation in rate must be between
-4/+6 seconds per day, or a precision
of 99.99% – the highest precision attainable
by a mechanical movement. A special
certificate accompanies all COSC-certified
movements.