The Titanium Field GuidePicks of the month

RDUNAE R1 Titanium Emperor Tuna

The RDUNAE R1 Titanium Emperor Tuna is a 52 mm Grade 5 titanium dive watch with a Seiko NH35 automatic movement. At 52 mm across, it is larger than 98% of the 359 titanium dive watches in the guide.

All RDUNAE watchesDiver watchesUnder $500MicrobrandGrade 5 titanium
Price
$229.9
Material
Titanium
Grade / type
Grade 5
Water resistance
200 m
Type
Diver
Case diameter
52.0 mm
Origin
China
Movement
Automatic
Caliber
Seiko NH35
Complications
Date
Colour
Grey
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Unconfirmed (bracelet, strap, or clasp hardware not confirmed)
Display back
No
Dial
Black
Dial colours
Black
Availability
Offered
Status
Current
Not published
Reference, Thickness, Lug-to-lug, Weight, Power reserve, Hardness, Construction, Surface treatment, Bracelet / strap, Matching bracelet, Crystal, Lume
Medium confidence Verified Jul 2026 Source: RDUNAE R1 Titanium Tuna
Facts are free to cite with a link.
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More watches from RDUNAE

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Frequently asked questions

What grade of titanium is the RDUNAE R1 Titanium Emperor Tuna?

Grade 5, from a secondary source. The guide has not yet read the grade on the maker's own page. The caseback is titanium too.

What size is the RDUNAE R1 Titanium Emperor Tuna?

The case is 52 mm across. It is water resistant to 200 m.

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

It is in production, at a list price of $229.90.

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