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Top-tier supplier movement · caliber Corum Cal. CO 082: ETA 2892 base, Corum-finished, 28,800bph, 42h PR; used in Admiral Cup Auto 42; Corum admiral pennant dial with NATO colors · 42h power reserve
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
42 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The Admiral's 12-sided case must have sharply faceted edges; any Admiral with rounded case edges has been polished and loses its defining design characteristic.

Known issues in the market
  • The 12-sided case is difficult to polish without rounding the facets; polishing is a common service error on these watches.
AreaWhat to checkWhat is correctRed flag
case12-sided case edge sharpnessSharp evenly-faceted 12-sided case; alternating brushed and polished surfaces on each facetRounded case edges; case has been polished, removing the facet sharpness
dialCorum key logoCorum key logo present on dialMissing Corum key logo; non-genuine dial
movementCO 082 movement architectureETA 2892 base with Corum-finished rotor visible through casebackNon-ETA-2892 movement architecture; non-genuine movement swap
Common legitimate replacements
  • Crystal; sapphire standard.
  • Bracelet or strap; Corum OEM.
Expert resources: Corum authorized service; Corum Admiral product documentation.

Authentication guide

Last reviewed June 2026

The Admiral is Corum's nautical-themed integrated bracelet sports watch. The 12-sided bezel (dodecagonal case shape) is the primary identifier.

Known reproduction risks

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LOW

Admiral replicas exist but the 12-sided case geometry is difficult to replicate accurately.

  • Replica 12-sided cases often have uneven flat sections; the angles between sides vary. On a genuine Admiral, the 12 sides are precisely equal.
  • Sail-pattern dial texture on replicas is printed flat; genuine is a textured surface with depth visible under light raking
  • Corum Key logo on replica crowns is shallower and less defined

Dial variants by era

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EraDescriptionIdentifiers
2015 to present (current generation)42mm 12-sided steel case with integrated bracelet. Sail-pattern dial motif. Date at 3. Corum Key crown logo at 12.
  • Case shape is 12-sided (dodecagonal); count the flat sides around the case
  • Sail-pattern texture on dial (diagonal lines representing the hull planking of a sailing vessel)
  • Corum Key logo on dial at 12 and on the crown
1960 to 2014 (vintage and transitional)Earlier Admiral references used the same nautical theme but with different case geometries. Pre-2015 pieces may have different bracelet integration.
  • Vintage Admiral cases vary; consult reference-specific documentation for each era
  • Corum Key is consistent across all generations

Service part flags

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Crown

Original: Corum Key logo on crown; the key shape is the brand's long-standing icon.

Replacement tells
  • Crown without the Key logo is an aftermarket replacement
  • Crown with a competitor's logo is obviously wrong
Bracelet

Original: Integrated bracelet matching the 12-sided case profile; links are shaped to follow the angular case geometry.

Replacement tells
  • Round or conventional-link bracelet does not match the Admiral case geometry
  • Clasp should have Corum branding and fold-over mechanism

Case back markings

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2015 to present
  • "CORUM ADMIRAL" and "Swiss Made"
  • Reference and serial numbers
  • Movement designation (ETA 2892 or Corum in-house depending on variant)
  • Water resistance (100M typical)

Movement tells

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  • Standard Admiral references use ETA 2892-A2; higher-tier variants use a Corum in-house or heavily decorated ETA.
  • The 12-sided case creates 12 flat sections; after service, confirm the caseback thread engages correctly on the correct flat-to-flat alignment.
  • After service, the bracelet clasp should engage and release cleanly; the angular bracelet is more prone to link loosening than round-link designs.
Sources: Corum Admiral product page.

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