The Titanium Field GuidePicks of the month

De Bethune DB28XS Sea Tourbillon

DB28XST

The De Bethune DB28XS Sea Tourbillon is a 38.7 mm Grade 5 titanium watch with a De Bethune DB2009V7 hand-wound movement. With a 120-hour power reserve, it runs longer than 94% of the 1,109 mechanical titanium watches with a stated reserve. At 8 mm thick, it is thinner than 93% of the 1,310 titanium watches with a stated thickness.

All De Bethune watchesOther watchesUnder 11 mm thickGrade 5 titaniumTourbillon
Material
Titanium
Grade / type
Grade 5
Reference
DB28XST
Type
Other
Price
– · price on request
Case diameter
38.7 mm
Thickness
8 mm
Origin
Switzerland
Movement
Manual, ultra-light tourbillon at 6 o'clock, 30-second indicator
Caliber
De Bethune DB2009V7
Power reserve
5 days
Complications
Tourbillon
Colour
Blue
Surface treatment
Polished
Finish technology
Natural finish
Caseback
Titanium (screwed, polished)
Nickel-free
Unconfirmed (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Leather strap
Crystal
Sapphire, double anti-reflective coating
Display back
No
Dial
Blued titanium hour ring with microlight decoration, blued grade 5 circular satin minutes/seconds ring
Availability
Offered
Status
Current
Not published
Lug-to-lug, Water resistance, Weight, Hardness, Construction, Matching bracelet, Lume
High confidence Verified Sep 2026 Source: De Bethune (maker)
Facts are free to cite with a link.
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Frequently asked questions

What grade of titanium is the De Bethune DB28XS Sea Tourbillon?

Grade 5, as stated by the maker. The caseback is titanium too.

What size is the De Bethune DB28XS Sea Tourbillon?

The case is 38.7 mm across and 8 mm thick.

How much does the De Bethune DB28XS Sea Tourbillon cost, and is it available?

It is in production, but the maker does not publish a price.

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