De Bethune

DB28 Tourbillon

Name: De Bethune DB28 Tourbillon DB28T
Brand: De Bethune
SKU: DB28T

Ref. DB28T

2012–present · 43mm · caliber De Bethune DB2019v2 (hand-wound, flying tourbillon, silicon/platinum balance, 6-day power reserve)

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In-house manufacture caliber · caliber De Bethune DB2019v2 (hand-wound, flying tourbillon, silicon/platinum balance, 6-day power reserve) · 144h power reserve (6 days)

Large case: suits wrists 7 in+ (18 cm+)

43 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.

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Authentication

The flying tourbillon must have no visible upper bearing or bridge above the cage; any tourbillon with a visible upper support is a different architecture.

Known issues in the market

The silicon/platinum inertia weights are De Bethune's thermal compensation system; their presence is verifiable only under magnification by a specialist.

Area	What to check	What is correct	Red flag
movement	Flying tourbillon architecture	Tourbillon cage with no visible upper bearing or bridge; appears to float above the movement	Visible upper bearing or cage support; different tourbillon architecture, not a flying tourbillon
movement	Tourbillon rotation rate	Cage completes exactly one rotation per 60 seconds	Rotation rate deviating from 60 seconds; regulation issue
caseback	DB28T serial and documentation	Matching serial number and original De Bethune certificate	Missing or non-matching documentation; requires expert authentication

Common legitimate replacements

No common replacements; De Bethune parts are proprietary.

Expert resources: De Bethune directly; specialist independent watch authenticators.

Authentication guide

Last reviewed June 2026

The DB28 Tourbillon combines the DB28 architecture with a flying tourbillon and spherical moonphase. Caliber DB2019v2 in titanium or white gold at 43mm. One of the most mechanically complex references in the De Bethune lineup.

Known reproduction risks

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LOW

No known replica. The combination of flying tourbillon, silicon escapement, and spherical moonphase cannot be assembled outside De Bethune.

Any bridge above the tourbillon cage means this is not a flying tourbillon or not a De Bethune
Flat moonphase disc disqualifies the moonphase as original

With a 2012 introduction date, earlier DB28T examples are over a decade old; service history documentation is critical.

Dial variants by era

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Era	Description	Identifiers
2012 to present	Blue, silver, or black dial with Roman numerals. Flying tourbillon at 6 o'clock. Spherical moonphase at 12 o'clock. Power reserve indicator. Case in titanium or white gold.	Flying tourbillon cage at 6 o'clock without a bridge above it Three-dimensional spherical moonphase at 12 o'clock DB28T designation on caseback and documentation Silicon/platinum balance components within the tourbillon cage 43mm titanium or white gold case

Service part flags

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Flying tourbillon cage

Original: The De Bethune flying tourbillon has no upper bridge; the cage appears to float above the dial. The cage is typically in titanium and contains the silicon balance wheel and spring.

Replacement tells

Any bridge structure above the tourbillon cage
Tourbillon cage in non-titanium material without documented specification
Balance wheel within the cage without the bi-metallic silicon/platinum construction

Spherical moonphase

Original: Identical specification to the DB28XP moonphase: three-dimensional sphere, not a flat disc.

Replacement tells

Flat moonphase disc indicating a non-original or serviced-incorrectly moonphase

Case back markings

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2012 to present

DB28T designation
Individual serial number
Ti or 750WG material designation
De Bethune name
30m water resistance

Movement tells

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The flying tourbillon should complete one rotation per minute and the cage should appear to float without visible mechanical support from the dial side.
Service on the tourbillon caliber requires De Bethune factory or authorized technician only; the silicon balance and cage components are not serviceable by general watchmakers.
Request timing machine results showing the tourbillon's regulation; a properly serviced DB28T should perform within ±5 seconds per day on a timing machine.

Sources: De Bethune official.