Premium automatic movement used in Seiko dress watches and divers. Seiko's answer to ETA 2824. Features Spron 510 mainspring for improved power reserve (50 hours). Base caliber for 6R20, 6R21, 6R24, 6R27 variants. Seiko-only version of NE15B sold by Seiko Instruments. Letter variants (A/B/C/D) indicate evolution stages, with 6R15D being the latest stable version.
Movement Type
Automatic
Jewel Count
23 jewels
Power Reserve
50h
Frequency
21,600 vph (6 Hz)
Diameter
27.4mm
Height
5.25mm
Display Type
Analog
Rotor Type
central_rotor
Winding
automatic_bidirectional
Shock Protection
diashock
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
6RCOUNTRY
japanALSO KNOWN AS
