The Wristwatch Field Guide

Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue)

The Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue) is a current-production diver watch with a grey high-intensity titanium case. It measures 40.8 mm across, 12.9 mm thick, and is water resistant to 300 m. Inside is the 9RB1 spring drive u.f.a. movement, with 72 h power reserve. Complications: Date. Priced from $12,400 (MSRP). Brand origin: Japan.

Titanium and ceramic diver watchesTitaniumDiversDisplay back
Reference
–
Type
Diver
Price
$12,400 · MSRP
Case diameter
40.8 mm
Thickness
12.9 mm
Lug-to-lug
–
Water resistance
300 m
Weight
–
Origin
Japan
Movement
Spring Drive U.F.A.
Caliber
9RB1
Power reserve
72 h
Complications
Date
Material
Titanium
Grade / type
High-Intensity Titanium
Colour
Grey
Hardness
–
Construction
–
Surface treatment
None
Caseback
–
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium bracelet
Matching bracelet
Standard
Crystal
Sapphire
Display back
Yes
Dial
Blue (Ushio)
Lume
LumiBrite
Availability
Offered
Status
Current
Medium confidence Verified Jul 2026 Source: Grand Seiko (maker) / Watches by SJX Maker / listing ↗
Facts are free to cite with a link.
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Alternatives to the Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue)

Zenith Defy Extreme Diver 42.5mm (titanium)ZenithDefy Extreme Diver 42.5mm (titanium)$12,30042.5 mm15.5 mm thickDiversame category · same style · shared complications · similar price
OmegaSeamaster Diver 300M Titanium-Tantalum (LE)$13,00042.0 mm161 gDiversame category · same style · shared complications · similar price
OmegaSeamaster Diver 300M Titanium Bronze Gold$14,30042.0 mm111 gDiversame category · same style · shared complications · similar price
RolexYacht-Master 42 (RLX Titanium)$14,50042.0 mmDiversame category · same style · shared complications · similar priceFranck Muller Skafander TitaniumFranck MullerSkafander Titanium$14,60043.1 mm14.1 mm thickDiversame category · same style · shared complications · similar priceBlancpain Fifty Fathoms Bathyscaphe TitaniumBlancpainFifty Fathoms Bathyscaphe Titanium$15,10043.0 mm13.45 mm thickDiversame category · same style · shared complications · similar price

More titanium and ceramic watches from Grand Seiko

Grand SeikoHeritage "Snowflake"$6,90040.2 mm12.5 mm thick100 gDress
Grand SeikoSpring Drive Diver 200m (SBGA231)$7,10044.0 mmDiver
Grand SeikoEvolution 9 Spring Drive Diver 200m "Ushio" (SLGA023)$9,60043.8 mmDiver
Grand SeikoSpring Drive U.F.A. Ushio 300 Diver (SLGB025, green)$12,40040.8 mm12.9 mm thickDiver
Grand SeikoHi-Beat 36000 GMT (SBGJ211, Mt. Iwate)$7,40040.0 mmDress
Grand SeikoEvolution 9 Spring Drive GMT (SBGE285, Mistflake)$8,40041.0 mm13.9 mm thickDress

Frequently asked questions

What is the case material of the Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue)?

The Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue) has a grey high-intensity titanium case. It is recorded at medium confidence pending a maker-stated material.

What size is the Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue)?

It is 40.8 mm in diameter, 12.9 mm thick, and water resistant to 300 m.

How much does the Grand Seiko Spring Drive U.F.A. Ushio 300 Diver (SLGB023, blue) cost, and is it available?

It is current-production and lists from $12,400.

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