De Ville Prestige Co-Axial 39.5mm

Name: Omega De Ville Prestige Co-Axial 39.5mm 424.13.40.20.02.001
Brand: Omega
SKU: 424.13.40.20.02.001

Ref. 424.13.40.20.02.001

2014–present · 39.5mm · caliber Omega Cal. 2500C: Co-Axial automatic, 25,200bph, 48h PR, 27j; anti-magnetic to 15,000 gauss; used in the mid-size De Ville Prestige

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In-house manufacture caliber · caliber Omega Cal. 2500C: Co-Axial automatic, 25,200bph, 48h PR, 27j; anti-magnetic to 15,000 gauss; used in the mid-size De Ville Prestige · 48h power reserve (2 days)

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

39.5 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The Co-Axial three-arm lever fork in Cal. 2500C is the primary authentication point; feel the star caseback relief with a fingernail to confirm genuine engraving versus a stamped fake.

Known issues in the market

Standard ETA-based movement swaps are the primary fraud vector; the Co-Axial fork in Cal. 2500C is architecturally distinct and visible through the caseback.
The Constellation star caseback engraving must have tactile relief; flat stamped stars indicate a non-genuine or replaced caseback.
Production ran approximately 2008 to 2020; examples with reference numbers outside this range may be a different generation.

Area	What to check	What is correct	Red flag
movement	Co-Axial escapement fork	Cal. 2500C with three-arm Co-Axial lever fork visible through caseback, distinct from standard ETA lever	Standard two-arm ETA lever without Co-Axial fork; any caliber designation other than 2500 or 2500C
caseback	Star caseback engraving relief	Deeply engraved star with relief felt under fingernail, sharp star-point edges	Flat stamped star with no tactile relief; rounded star points indicating a cast or stamped caseback
dial	Dial lacquer and indices	Applied indices with uniform height, lacquered sunray base with even sheen	Printed indices, lacquer with bubbling or delamination, any index with different height from its neighbors

Common legitimate replacements

Dials on older De Ville Prestige models occasionally show lacquer aging; confirm no re-lacquering by checking for uniform sheen under a loupe.
Bracelets and straps are frequently replaced on pre-owned examples; original Omega-signed deployant confirms bracelet provenance.

Expert resources: Omega.com De Ville Prestige archive documentation for the 2008 to 2020 generation. Omega Forums for Cal. 2500C vs. ETA escapement identification.

Authentication guide

Last reviewed June 2026

The De Ville Prestige 39.5mm sits between the 37mm and 42mm variants. Same cal. 2500C Co-Axial with the slim dress-watch profile. The baton indices (rather than the Roman numerals of the 37mm) and the date window are the visual differentiators within the Prestige lineup.

Known reproduction risks

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LOW

Dial variant confusion within the Prestige lineup

Roman numerals on a watch sold as the baton-index 39.5mm -- different dial from the 37mm variant
Case diameter closer to 37mm than 39.5mm

The De Ville Prestige is not a high-volume fake target. Variant confusion within the Prestige lineup is a more frequent concern than outright reproduction.

Dial variants by era

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Era	Description	Identifiers
2014 to present (cal. 2500C)	Slim case (10.6mm) with applied baton indices and date window. Silver, blue, and black dial colorways. Leather strap standard. "Co-Axial" designation confirming the movement type. The case diameter is 39.5mm -- slightly larger than the 37mm but uses baton indices rather than Roman numerals.	Applied baton indices -- distinguishes the 39.5mm from the Roman-numeral 37mm Prestige Date window at 3 o'clock "Co-Axial" designation on the dial Slim 10.6mm case profile No screw-down crown -- the Prestige uses a push-pull crown Leather strap standard

Service part flags

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Applied baton indices

Original: Applied baton indices with specific proportions -- narrower than many Omega sport-watch indices. Each index is applied with clean base edges. Under magnification the adhesive/prong attachment should not be visible from the front.

Replacement tells

Roman numeral chapter ring instead of baton indices -- indicates a 37mm Prestige dial installed in the 39.5mm case
Index alignment inconsistent -- one or more indices visibly canted or not at 90 degrees to the chapter ring
Adhesive or prong visible from the front at the base of an index

Movement caliber

Original: Cal. 2500C is automatic Co-Axial with 48-hour power reserve and bidirectional winding. The Prestige 39.5mm has a solid caseback -- caliber verification requires opening the case.

Replacement tells

Crown winds with no progressive resistance from a run-down state -- indicates a quartz or non-functional movement
Seconds hand discrete-ticks rather than sweeping smoothly

Case back markings

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2014 to present

Caliber 2500C designation
"De Ville" and "Co-Axial" text
"30 M / 100 FT" water resistance
Case reference and serial number
"OMEGA" and "SWISS MADE"
Solid caseback

Movement tells

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Cal. 2500C winds automatically with bidirectional rotor. Power reserve is 48 hours. A watch stopping in less than 24 hours on the wrist has a winding or mainspring issue.
The Prestige 39.5mm shares the cal. 2500C with the 37mm variant. Service records and documentation confirming caliber identity are standard expectations for a purchase with any history.

Sources: Omega De Ville official; Fratello De Ville Prestige Co-Axial review.