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Home/Browse/Grand Seiko/STGK031
Grand Seiko STGK031 — STGK031G
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Grand Seiko STGK031

Ref. STGK031G
Dress

Grand Seiko STGK031 owners widely praise its subtle, light pink dial that shifts to appear white or silver depending on lighting, its refined 30mm case size, and its simple elegance. Some find the 30mm sizing perfect for wearability, with one owner noting it is ideal for those who find 38mm watches too large. The Zaratsu polishing is also a noted strength. However, the Calibre 9S27 movement has a 50-hour power reserve and an accuracy range of +8 to -3 seconds per day, which some consider modest for the price. On balance, owners and reviewers rate the Grand Seiko STGK031 highly for its versatile dial and refined 30mm case.

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STGK031
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STGK031
2 Variants
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Buy used on eBay ↗
Retail MSRP
$6,600
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Alternatives
Case
30mm
Power Reserve
50h
Movement
Automatic
Water Resistance
100m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter30mm
Thickness10.5mm
Lug-to-Lug36.2mm
Lug Width15mm
02

Case Build

MaterialStainless Steel
Water Resistance100m
03

Crystal & Dial

CrystalSapphire
AR CoatingYes
Dial ColorSTGK031G
04

Movement

Caliber
9S27
TypeAutomatic
Beat Rate—
Power Reserve50 hours
Jewels—
HackingNo
Hand-WindingNo
ComplicationsTime only
05

Design Language

Dial styleTextured
BezelFixed
Bracelet / strapLug-attached bracelet
HandsDauphine
AI-detected from product image · 5/22/2026
In a nutshell

The Grand Seiko STGK031 is an automatic dress watch, with a 30mm stainless steel case, 10.5mm thick, powered by the 9S27 movement and a 50-hour power reserve. Water resistance is rated to 100m, under a sapphire crystal. Manufacturer MSRP is $6,600.

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