Skip to content
The Encyclopedia of Horology

Wristwatch · Regatta chronograph wristwatch

Bulgari Diagono Professional Chrono Amplificator Regatta

Partially verified

This Bulgari Diagono Professional Chrono Amplificator, reference CHW40GAM, is an 18k white gold wristwatch constructed for yacht racing timing. The timepiece measures approximately 40mm in diameter and is fitted with a brown leather strap that secures via an 18k white gold deployant buckle. The white dial features a three-register layout including a red, white, and blue regatta countdown display and is signed "Bulgari" and "Swiss Made." It is powered by an automatic 39-jewel movement utilizing an ETA 2892-A2 base caliber integrated with a Dubois-Depraz 2027 regatta module to provide flyback chronograph functionality. The case, dial, movement, and buckle are signed by Bulgari. The fixed bezel is engraved with the brand name. The mechanical movement is configured for standard chronograph operations, including start, stop, and reset functions to support sailing regatta timing.

Front view of the Bulgari Diagono Professional Chrono Amplificator featuring a white dial, three-register layout, and engraved bezel.
Front view of the Bulgari Diagono Professional Chrono Amplificator featuring a white dial, three-register layout, and engraved bezel. — Luxe Auctioneers, via Invaluable. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
orbiscollectibles.com
Category
Wristwatch · Regatta chronograph wristwatch
Maker / attribution
Bulgari
Reference
CHW40GAM
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Circa 2005
Source-reported place
Not established

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial Design

The watch features an 18k white gold case measuring approximately 40mm in diameter. The fixed external bezel is distinctively engraved with the brand name 'BVLGARI'. The watch is equipped with a brown leather strap paired with an 18k white gold deployant buckle, which is signed by the manufacturer.

The dial is white and displays a three-register layout designed for yacht racing. A primary feature is the inclusion of a red, white, and blue regatta countdown display. The dial carries the 'Bulgari' signature and is marked 'Swiss Made' at the bottom. The overall case construction includes pushers on the side for the flyback chronograph operation.

Evidence for this section
  • “measures approximately 40mm in diameter”
  • “fixed bezel engraved with the brand name”
  • “white dial is marked "Bulgari" and "Swiss Made," and it incorporates a distinct three-register chronograph layout alongside a red, white, and blue regatta countdown display”

Movement and Functionality

The timepiece is powered by an automatic 39-jewel mechanical movement. The caliber is based on an ETA 2892-A2, which has been integrated with a Dubois-Depraz 2027 regatta module. This combination allows for flyback chronograph functionality, including the ability to start, stop, and reset for timed events.

The regatta module is specifically configured to assist in sailing countdowns. The signed movement is a central component of the watch's professional yachting utility, as described in the provided specifications regarding the reference CHW40GAM.

Evidence for this section
  • “powered by an automatic 39-jewel movement based on an ETA 2892-A2 caliber, integrated with a Dubois-Depraz 2027 regatta module to facilitate flyback chronograph functionality”
  • “mechanical movement is configured for chronograph operations including starting, stopping, and resetting functions”

Signatures and Attribution

The object is attributed to the brand Bulgari, with signatures present on the case, dial, movement, and the deployant buckle. The identification of the reference number CHW40GAM and the approximate date of circa 2005 are provided as part of the listing details for this specific example.

There are no additional catalogue numbers provided in the source documentation. The provided information is based on an auction-house listing, and while the evidence indicates the object's features, it does not serve as an authentication certificate for the piece.

Evidence for this section
  • “The case, dial, movement, and buckle are all signed by Bulgari”
  • “This Bulgari Diagono Professional Chrono Amplificator, reference CHW40GAM”
  • “Circa 2005”

Open research questions

  • What is the specific serial number range for this reference within the Diagono Professional series?
  • What is the full list of production years for the reference CHW40GAM?

Source evidence

Recorded claims and source quotations for Bulgari Diagono Professional Chrono Amplificator Regatta
FieldSource-reported valueSource quotation
MakerBulgari“Bulgari”
ReferenceCHW40GAM“reference CHW40GAM”
Case Material18k white gold“18k white gold”
MovementAutomatic 39-jewel“automatic 39-jewel movement”
CaliberETA 2892-A2 with Dubois-Depraz 2027 module“based on an ETA 2892-A2 caliber, integrated with a Dubois-Depraz 2027 regatta module”
Size40mm“measures approximately 40mm in diameter”
DateCirca 2005“Circa 2005”

Visible details

  • Fixed bezel engraved with 'BVLGARI'
  • Three-register dial layout
  • Red, white, and blue countdown display arc
  • Brown leather strap with deployant buckle

Research qualifications

  • The exact serial number is not provided in the source.
  • The precise manufacturing origin is not documented by the source.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Bulgari 18k white gold Diagono Professional Chrono Amplificator Regatta wristwatch

Reviewed 2026-11-02 · Record 0b2a6ab054

Terms in this record

Glossary explanations for terms named in this object’s record.