↓7.4%eBay asking prices. Condition and box/papers status not filtered.
Down 7% over the past 90 days
Based on eBay sales, last 12 months
Condition affects price
Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.
New Old Stock
Unworn example retaining original packaging, tags, and warranty documentation.
$133,250–$153,750
+30–50% vs median
Unpolished
Worn but the case has never been polished; original brushed and polished surfaces are intact.
$117,875–$128,125
+15–25% vs median
Polished
Case has been professionally or amateur polished at some point; edge definition is softened.
$87,125–$97,375
-15 to -5% vs median
Recently Serviced
Movement has been recently serviced with documented service records; case condition varies.
$102,500
At median
In-house manufacture caliber · caliber De Bethune DB2019v2 (hand-wound, flying tourbillon, silicon/platinum balance, 6-day power reserve)
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.
Not yet rated
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
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
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.
No common replacements; De Bethune parts are proprietary.
Expert resources: De Bethune directly; specialist independent watch authenticators.
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.
