The 4R39 is an open-heart automatic movement with exposed balance wheel at 9 o'clock and 24-hour subdial at 10:30. Adds AM/PM indication to the 4R38 design. The TMI equivalent is NH39A for third-party brands.
Movement Type
Automatic
Jewel Count
24 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
2011CALIBER FAMILY
4RCOUNTRY
JapanALSO KNOWN AS
