Automatic Spring Drive 3-Day GMT
In 2006, just two years after the completion of Caliber 9R65, Grand Seiko's first 9R Spring Drive movement with a GMT (Greenwich Mean Time) function, Caliber 9R66, was unveiled.
|Automatic with manual winding
|±1 second per day (±15 seconds per month)
|Reserva de marcha
|Approximately 72 hours
|Número de rubis
|-Power reserve indicator
-Dual time function with 24-hour hand
-Quick correction function of time difference adjusting to a calendar
What makes 9R Spring Drive special?
Spring Drive, one of the great innovations in modern watch making history, regulates a spring-driven movement with state-of-the-art electronic technology that functions without batteries or other external power source. Its sole power source is a mainspring, which drives a series of gears. A rotor, connected to the end of these gears, generates a small electrical charge that activates an electronic circuit and quartz oscillator. Its accuracy is unprecedented for a watch wound by a mainspring. The development of the 9R Spring Drive movement was possible only because Grand Seiko is one of the few manufacturers with expertise in both mechanical and electronic watches.
Caliber 9R66 Modelos
Movimento 9R Spring Drive
Os três movimentos no coração da Grand Seiko
Um dos principais movimentos mecânicos do mundo, o ápice da microengenharia de alta precisão e a atenção aos detalhes dos relojoeiros especialistas da Grand Seiko.
O Spring Drive é um movimento exclusivo que oferece precisão de um segundo por dia, usando apenas a força de uma mola principal.