The Titanium Field Guide

De Bethune DB28XS Sea Tourbillon

DB28XST

The De Bethune DB28XS Sea Tourbillon is a current-production watch with a grade 5 titanium case, finished with polished.

All De Bethune watchesWatch other 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)
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Frequently asked questions

What is the case material of the De Bethune DB28XS Sea Tourbillon?

The De Bethune DB28XS Sea Tourbillon has a grade 5 titanium case with a titanium (screwed, polished) caseback. This is confirmed against the maker spec.

What size is the De Bethune DB28XS Sea Tourbillon?

It is 38.7 mm in diameter, 8 mm thick.

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

It is current-production; the guide does not list a price for it.

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