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Mass-produced#1 in family

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Service

Recommended interval
every 5 years
Typical cost (USD)
$300 – $600
Parts availability
excellent

One of the most widely serviced calibers in the world; any competent independent can handle it. Parts are inexpensive and stocked everywhere.

Also uses ETA 2824-2

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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

Crown protection wings must be intact; bent or missing wings are the most common damage on used Diagono references.

Known issues in the market
  • Bent or missing crown protection wings are the most common damage on used Diagono examples; wings are integral to the case and cannot be replaced without case work.
  • Diagono angular case profile is specific to this line; any case with a different angular profile is a wrong case.
AreaWhat to checkWhat is correctRed flag
caseCrown protection wing conditionBoth crown protection wings intact and symmetric; no bending or damageBent, damaged, or missing crown protection wings; common case damage
caseDiagono angular case profileAngular Diagono case profile consistent with this line; correct proportionsWrong case profile; non-Diagono case
casebackETA 2824-2 movementETA 2824-2 movement visible; appropriate for this reference tierWrong base movement; movement swap
Common legitimate replacements
  • Rubber strap; Bvlgari OEM preferred.
  • Crystal; sapphire standard.
Expert resources: Bvlgari Diagono Scuba product documentation.

Authentication guide

Last reviewed June 2026

The Diagono Scuba is Bulgari's dive watch, notable for using an ETA 2824-2 base movement rather than an in-house caliber. This is disclosed by Bulgari and is correct for this reference. Authentication concerns center on the correct dive case specification and the unidirectional bezel.

Known reproduction risks

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LOW

The Diagono Scuba has low replica exposure due to its mid-tier positioning. The main risk is bezel substitution or non-original dials on pre-owned examples.

  • Bezel that rotates bidirectionally rather than unidirectionally
  • Bezel scale markings that are printed flat rather than engraved
  • Crown that does not screw down
  • Movement bridge layout inconsistent with ETA 2824-2

Dial variants by era

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EraDescriptionIdentifiers
2012 to present (black)Matte black dive dial with applied luminous indices, unidirectional rotating bezel, date at 3. More conventional dive watch architecture than the Octo family.
  • Matte black dial with applied luminous indices and luminous hands
  • "BVLGARI" text at 12 o'clock and "DIAGONO SCUBA" text on the dial
  • Unidirectional rotating bezel with 60-minute timing scale
  • Date window at 3 o'clock on white disc
  • 200M water resistance notation on dial
  • Round case -- no octagonal elements; the Diagono is a conventional round case
2012 to present (blue)Blue dial variant with the same Diagono Scuba layout.
  • Blue sunray or matte blue dial
  • Same unidirectional bezel and date layout as the black variant
  • "BVLGARI" and "DIAGONO SCUBA" text

Service part flags

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Unidirectional bezel

Original: The dive bezel rotates counterclockwise only with positive click stops. The bezel insert carries a 60-minute scale with a luminous marker at 12. Bezel markings should be engraved and filled, not printed.

Replacement tells
  • Bezel that rotates bidirectionally -- the Diagono Scuba bezel is strictly unidirectional
  • Bezel insert with printed markings rather than engraved scale
  • Luminous marker at 12 inconsistent in color or brightness with the dial lume
ETA 2824-2 movement

Original: The Diagono Scuba uses an ETA 2824-2, which Bulgari discloses. The movement visible through an opened caseback will be a standard mid-tier Swiss automatic with ETA bridge layout. The movement should be signed "Bvlgari" or carry Bulgari identification even on the ETA base.

Replacement tells
  • Movement with bridge layout clearly inconsistent with ETA 2824-2 architecture -- indicates a different base caliber was swapped in
  • Movement with no Bulgari identification on the rotor or plate
  • Rotor with generic finishing rather than Bulgari-signed quality on a stated Bulgari example
Screw-down crown

Original: The crown screws down for 200M water resistance. The crown should engage thread positively when screwed home and must seat fully against the crown tube.

Replacement tells
  • Crown that does not screw down -- the 200M rating requires a screw-down crown
  • Crown with no Bulgari or "B" identification on the crown face
  • Crown tube with visible thread damage or cross-threading

Case back markings

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2012 to present
  • Solid screw-down caseback with Bulgari text
  • "BVLGARI" on the caseback
  • Reference "SCB42C3SSD" or variant on case band
  • "SWISS MADE" on the caseback
  • "200M" water resistance rating
  • Serial number on caseback or case band

Movement tells

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  • ETA 2824-2 beats at 28,800bph with a 38 to 42-hour power reserve. A fully wound Diagono Scuba stopping before 32 hours warrants service.
  • The date change at midnight should be crisp. Gradual advance indicates worn quickset lever.
  • The rotor should spin smoothly and bidirectionally. Unidirectional winding indicates worn automatic mechanism.
  • Bulgari service on ETA-based references can be performed by any ETA-qualified watchmaker. The caliber has abundant parts availability.
Sources: Bulgari -- Diagono Scuba specification; WatchUSeek -- Bulgari Diagono authentication.

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Buying guidance

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