The Wristwatch Field Guide

Seiko Prospex Marinemaster Tuna 1000m SBBN047

SBBN047 / S23631

The Seiko Prospex Marinemaster Tuna 1000m SBBN047 is a current-production diver watch with a titanium (super titanium) case, finished with dia-shield; ceramic shroud. At 119 g it sits around the middle for diver watches in the guide, and is priced well above the $1,199 median for the category.

All Seiko watchesExotic-material diver watchesTitaniumDiversUnder $5,000
Price
$3,500
Material
Titanium
Grade / type
Titanium (Super Titanium)
Weight
119 g (head only)
Water resistance
1000 m
Reference
SBBN047 / S23631
Type
Diver
Case diameter
49.4 mm
Thickness
16.3 mm
Origin
Japan
Movement
Quartz
Caliber
Seiko 7C46
Power reserve
5 years
Complications
Day-date
Colour
Grey
Surface treatment
Dia-Shield; ceramic shroud
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Silicone strap
Crystal
Sapphire
Display back
No
Dial
Black
Dial colours
Black
Lume
LumiBrite
Availability
Offered
Status
Current (JDM); maker titanium token pending re-verification
Not published
Lug-to-lug, Hardness, Construction, Caseback, Matching bracelet
Medium confidence Verified Jun 2026 Source: Gnomon Watches Maker ↗
Facts are free to cite with a link.
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Alternatives to the Seiko Prospex Marinemaster Tuna 1000m SBBN047

MTM Silver US-744XMTMSilver US-744X$3,60045.0 mm16 mm thick156 gDiversame category · same style · shared complications · similar price
TutimaM2 Coastline (titanium)$3,70043.0 mm12.9 mm thickDiversame category · same style · shared complications · similar priceEterna KonTiki Bronze ManufactureEternaKonTiki Bronze Manufacture$2,65044.0 mm14.05 mm thickDiversame category · same style · similar price
STILMegara Limited Edition (Titanium)$2,68042.0 mm13.4 mm thickDiversame category · same style · similar price
Maurice LacroixPontos S Diver Bronze$2,70042.0 mmDiversame category · same style · similar priceCitizen Promaster 1000m Professional Diver (Super Titanium)CitizenPromaster 1000m Professional Diver (Super Titanium)$2,77553.0 mm181.4 gDiversame category · same style · similar price

More exotic-material watches from Seiko

Seiko Prospex Shogun Titanium (SPB191)SeikoProspex Shogun Titanium (SPB191)$1,20043.5 mm13.3 mm thick99 gDiver
SeikoProspex "Cave Diver" Shogun Titanium (SPB349)$1,50043.5 mmDiverSeiko Prospex SeikoProspex "Cave Diver" Shogun Titanium (SPB351)$1,50043.5 mmDiver
SeikoProspex "Cave Diver" Shogun Titanium (SPB357)$1,50043.0 mmDiverSeiko Prospex Marinemaster Professional 600m Titanium (SBDX067)SeikoProspex Marinemaster Professional 600m Titanium (SBDX067)$4,60045.4 mmDiverSeiko Prospex LX Line Spring Drive GMT Titanium (SNR035)SeikoProspex LX Line Spring Drive GMT Titanium (SNR035)$5,25044.8 mmOther

Frequently asked questions

What is the case material of the Seiko Prospex Marinemaster Tuna 1000m SBBN047?

The Seiko Prospex Marinemaster Tuna 1000m SBBN047 has a titanium (super titanium) case. It is recorded at medium confidence pending a maker-stated material.

What size is the Seiko Prospex Marinemaster Tuna 1000m SBBN047?

It is 49.4 mm in diameter, 16.3 mm thick, and water resistant to 1000 m.

How much does the Seiko Prospex Marinemaster Tuna 1000m SBBN047 weigh?

About 119 g (head).

How much does the Seiko Prospex Marinemaster Tuna 1000m SBBN047 cost, and is it available?

It is current-production and lists from $3,500.

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