Family: 9R30 jewels72h power reserve
The Caliber 9R66 is Seiko's automatic Spring Drive movement with GMT function, introduced in 2007 and based on the 9R65 caliber. It delivers ±15 seconds per month accuracy through Spring Drive's continuous glide motion, paired with a 72-hour power reserve. The movement features a power reserve indicator and dual time display via a 24-hour hand, with 30 jewels for smooth operation. It remains in production.
TECHNICAL SPECIFICATIONS
Movement Type
Spring Drive
Jewel Count
30 jewels
Power Reserve
72h
Display Type
Analog
Winding
Spring Drive
COMPLICATIONS
GMT
FEATURES
24-Hour Hand
More Seiko movements
QUICK FACTS
BRAND
TYPE
Spring DriveSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2007BASED ON
Seiko 9R65CALIBER FAMILY
9RALSO KNOWN AS
caliber 9r66
FOR WATCH DEALERS
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