SBGM221

Main Features

SBGM221 is a classic-style GMT model that has long been supported by many customers. It is powered by the evolved mechanical automatic 3Days GMT Caliber 9S66.

Movement

Caliber: 9S66
Driving system: Mechanical, automatic with manual winding
Power reserve: Approximately 72 hours, or about 3 days
Static accuracy: +5 to -3 seconds per day
Normal usage accuracy: +10 to -1 seconds per day
Jewels: 35

Caliber 9S66 adds a GMT function to the basic performance of Grand Seiko’s standard 9S65 automatic movement. The fourth 24-hour hand allows the wearer to display a second time zone.

Exterior

Case: Stainless steel
Case back: Stainless steel and sapphire crystal
Case back: See-through case back fixed with six screws
Crystal: Box-shaped sapphire crystal
Coating: Anti-reflective coating on inner surface

The box-shaped sapphire crystal enhances the classical look, while the see-through case back lets the wearer enjoy the movement.

Size

Case size: 39.5mm diameter, 46.9mm lug-to-lug, 13.7mm thickness
Band width: 19mm
Maximum strap length: 185mm
Weight: 88g.

Water Resistance and Functions

Water resistance: Daily life water resistance
Magnetic resistance: Yes
Clasp: Three-fold clasp with push button release
Other features: 24-hour hand, dual time display function, calendar-linked time difference adjustment function.

Ivory Dial

The warm ivory dial is one of the key design points. It creates a softer and more classical impression than a bright white dial, pairing beautifully with the dark brown leather strap.

Blue Steel GMT Hand

The tempered blue GMT hand stands out clearly against the ivory dial. It is shorter than the other hands and positioned lower on the dial side, so it does not interfere with normal time readability while still making the second time zone easy to identify.

Classic Case Design

The box-shaped sapphire crystal, gently flowing lugs, and delicate Zaratsu polishing create a refined classical form. This gives the watch an elegant vintage-inspired feel without making it look outdated.

Practical 3Days GMT

With approximately 72 hours of power reserve, SBGM221 can keep running for about three days when fully wound. The GMT function is especially useful for travelers or customers who need to track two time zones.

Recommended For

This model is easy to recommend for customers looking for Grand Seiko dress watches, Japanese mechanical GMT watches, classic luxury watches, ivory dial watches, leather strap watches, or refined Made in Japan watches for travel, business, and formal styling.