Spring Drive chronograph with GMT function featuring column wheel system and vertical clutch for precise chronograph operation. The READY/START two-step button mode ensures error-free operation, same as Seiko's professional sports stopwatches. Screw-lock pushers prevent accidental activation. Accuracy of ±15 seconds per month.
Movement Type
Spring Drive
Jewel Count
50 jewels
Power Reserve
72h
Frequency
28,800 vph (8 Hz)
Diameter
32mm
Height
7.1mm
Display Type
Analog
Rotor Type
bidirectional
Winding
Magic Lever
Shock Protection
Diashock
BRAND
Grand SeikoTYPE
Spring DriveSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2007CALIBER FAMILY
9RCOUNTRY
JapanALSO KNOWN AS
