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Case
38.5mm
Power Reserve
84h
Movement
Spring Drive
Water Resistance
30m
01
Case Dimensions
Diameter38.5mm
Thickness9.8mm
Lug-to-Lug43.7mm
Lug Width19mm
02
Case Build
MaterialPlatinum
Water Resistance30m
03
Crystal & Dial
CrystalSapphire
AR CoatingYes
04
Movement
Caliber
TypeSpring Drive
Beat Rate—
Power Reserve84 hours
Jewels—
HackingNo
Hand-WindingNo
ComplicationsTime only
05
Design Language
Dial styleSunburst
BezelFixed
Bracelet / strapLeather strap
HandsDauphine
AI-detected from product image · 5/22/2026
In a nutshell
The Grand Seiko SBGZ003 (ref. sbgz003j) is a spring drive dress watch, with a 38.5mm platinum case, 9.8mm thick, powered by the 9R02 movement and a 84-hour power reserve. Water resistance is rated to 30m, under a sapphire crystal.