The Wristwatch Field Guide

RDUNAE R1 Titanium Emperor Tuna

The RDUNAE R1 Titanium Emperor Tuna is a current-production diver watch with a grey grade 5 case. It measures 52.0 mm across, and is water resistant to 200 m. Inside is the Seiko NH35 automatic movement. Complications: Date. Priced from $229.9. Brand origin: China.

Titanium and ceramic diver watchesTitaniumDiversUnder $5,000
Reference
–
Type
Diver
Price
$229.9
Case diameter
52.0 mm
Thickness
–
Lug-to-lug
–
Water resistance
200 m
Weight
–
Origin
China
Movement
Automatic
Caliber
Seiko NH35
Power reserve
–
Complications
Date
Material
Titanium
Grade / type
Grade 5
Colour
Grey
Hardness
–
Construction
–
Surface treatment
–
Caseback
Titanium
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
–
Matching bracelet
–
Crystal
–
Display back
No
Dial
–
Lume
–
Availability
Offered
Status
Current
Medium confidence Verified Jul 2026 Source: RDUNAE R1 Titanium Tuna Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the RDUNAE R1 Titanium Emperor Tuna

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WatchdivesWD007 Top Hat Sapphire Titanium$19942.0 mmDiversame category · same style · shared complications · similar price
WatchdivesWD007 39mm PT5000 Titanium NTTD$19939.0 mmDiversame category · same style · shared complications · similar priceAragon Enforcer Titanium 9015AragonEnforcer Titanium 9015$22944.0 mm16 mm thick181 gDiversame category · same style · shared complications · similar price

More titanium and ceramic watches from RDUNAE

RDUNAER1 Zaku Tuna-II$209.952.0 mmDiver

Frequently asked questions

What is the case material of the RDUNAE R1 Titanium Emperor Tuna?

The RDUNAE R1 Titanium Emperor Tuna has a grey grade 5 case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the RDUNAE R1 Titanium Emperor Tuna?

It is 52.0 mm in diameter, and water resistant to 200 m.

How much does the RDUNAE R1 Titanium Emperor Tuna cost, and is it available?

It is current-production and lists from $229.9.

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