The 4R71 is Seiko's skeletonized automatic movement, the branded version of the NH70A. Features 23 jewels (vs NH70A's 24) with nickel-plated finish and Côtes de Genève decorated rotor. Used in Seiko Premier and open-heart models.
Movement Type
Automatic
Jewel Count
23 jewels
Power Reserve
41h
Frequency
21,600 vph (6 Hz)
Diameter
27.4mm
Height
5.32mm
Display Type
Analog
Rotor Type
bidirectional
Winding
Magic Lever
Shock Protection
Diashock
BRAND
SeikoTYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2016CALIBER FAMILY
4RCOUNTRY
JapanALSO KNOWN AS
