Bulgari Diagono Professional GMT 40 S

Technical characteristics

Type

GMT wristwatch

Bezel

24-hour bidirectional

Maker

Bulgari

Strap

Rubber with deployant clasp

Serial

L 08590

Diameter

40 mm

Functions

Date, AM-PM, Two-time zone

Reference

GMT 40 S

Case Material

Stainless steel

Place recorded

Switzerland

Maker / attribution

Bulgari

Design

Case and Dial

The Bulgari GMT 40 S features a stainless steel, tonneau-shaped case measuring 40 mm. The design includes crown guards that protect the winding crown, and the watch is engineered to be water-resistant with a screwed case-back. The bezel is a bidirectional revolving component graduated with a 24-hour scale for AM-PM reference. The dial is finished in a silver sunburst pattern. It incorporates center seconds and three specific complications: a subsidiary date dial at the 6 o'clock position, a central 24-hour AM-PM scale for day and night indication, and a two-time zone display. Adjustment for the time zone is managed via round screwed push-pieces positioned at the 2 and 4 o'clock marks, while the date is adjusted by a similar push-piece at 8 o'clock.

Visible features

• Bidirectional 24-hour revolving bezel • Screwed push-pieces at 2, 4, and 8 o'clock • Integrated rubber strap with deployant clasp • Silver-tone sunburst dial finish

Movement and Functionality

The watch operates on a self-winding mechanical movement that is officially certified as a chronometer. The functions provided include a local time display, a second time zone, a 24-hour diurnal and nocturnal indicator, and a date display. The watch is signed across the dial, case, and movement to confirm its origins. Adjustments for the complications are facilitated through a set of integrated push-pieces. The independent adjustment of the second time zone is achieved via the push-pieces at 2 and 4 o'clock, while the date function is regulated through the push-piece located at the 8 o'clock position.

Identification and Provenance

This watch is identified as part of the Diagono Professional line. According to the provided documentation, the object is dated to circa 2010. The case number is recorded as L 08590. The timepiece is currently fitted with an integrated black rubber strap and a stainless steel Bulgari deployant clasp. The auction description reports the condition of the watch, assigning a general grade of AA. Specifically, the case and dial are rated as '1', indicating they are in as-new condition, while the movement is also assigned a grade of '1'.

Identification

Reference

GMT 40 S

Serial number

L 08590

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.