Grand Seiko Grand Seiko STGF389
STGF389 2025–present or unrecorded end
GSdb modern model identity
Case
direct Dimensions and fit
Case length26 mm
Case width / diameter26 mm
Case thickness8.1 mm
Lug-to-lug32.9 mm
Lug widthNot recorded
Water resistanceNot recorded
The dimension basis is not currently recorded.
Open dimension source ↗Movement
QuartzCalibre and mechanism
Calibre4J51
Normalized calibre4J51
GenerationNot recorded
Power reserveNot recorded
Technical data
Not applicable Conventional winding
This movement is not assigned a motor-winder programme in the Watch Library.
Conventional winding fields are evidence-linked reference data. They are separate from any device-specific axial-control profile.
Market context
Date not recordedMarket-value disposition
No exact-reference public market estimate has been admitted for this record.
Market observations are separate from manufacturer specifications and are not used to fill technical gaps.