Grand Seiko SBGM257

Grand Seiko SBGM257

39.5mm · Stainless Steel · Caliber 9S66 · 30m

Grand Seiko Elegance Moondrop GMT SBGM255

Brand
Grand Seiko
Full reference
SBGM257
Case diameter
39.5mm
Case material
Stainless Steel
Water resistance
30m
Movement
Automatic
Caliber
9S66
Power reserve
72 hours
Functions / complications
Central Seconds, Date, Second Time Zone
Dial color
Blue
Bracelet / strap
Leather

Sources & record notes

Displayed specifications follow the most complete source record. Other source records are retained below; conflicting values are not silently combined. The Watch Pages.

The Watch Pages · Grand Seiko SBGM257

Original collection: Not recorded

Technical Specifications / Date Added: November 5, 2025
Technical Specifications / Reference: SBGM257
Technical Specifications / Brand: Grand Seiko
Technical Specifications / Case Size: 39.5mm
Technical Specifications / Case Material: Stainless Steel
Technical Specifications / Dial Color: Blue
Technical Specifications / Movement: Automatic
Technical Specifications / Caliber: 9S66
Technical Specifications / Power Reserve: 72 hours
Technical Specifications / Water Resistance: 30m
Technical Specifications / Strap Material: Leather
Technical Specifications / Strap Color: Blue
Technical Specifications / Buckle Type: Folding Clasp
Technical Specifications / Style: Classic
Technical Specifications / Special Features: Open Case Back, Water Resistant
Technical Specifications / Complications: Central Seconds, Date, Second Time Zone

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Corrections and data limitations