Family: 7S21 jewels40h power reserve21,600 vph (3 Hz)
Seiko caliber 7S26 changed from caliber A to caliber B in October 2006 production, with attention to balance staff design for repairs.
Last updated 8 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
21 jewels
Power Reserve
40h
Frequency
21,600 vph (3 Hz)
Display Type
Analog
Shock Protection
Diashock
FEATURES
Hand WindingHacking Seconds
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
DiscontinuedMANUFACTURE
In-houseLAUNCH YEAR
1996CALIBER FAMILY
7SCOUNTRY
JapanALSO KNOWN AS
7s26b7s26c
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