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The Encyclopedia of Horology

Wristwatch · Tourbillon wristwatch

Antoine Preziuso Calibre T21 Gibeon Meteorite Tourbillon No. 1

Partially verified

This Antoine Preziuso wristwatch, identified as No. 1 of the Calibre T21 series, was manufactured in 2005. The timepiece features a distinct two-body case precision-milled from a single piece of Gibeon meteorite, complemented by a brushed stainless steel transparent case back secured with six screws. The watch is powered by the Calibre T21 movement, which incorporates a one-minute tourbillon regulator with an A-shaped polished steel carriage, 25 jewels, and twin barrels. The rhodium-plated movement is hand-engraved with stars and a comet motif. The dial is black with luminous Arabic numerals and features a cut-away section at the lower third to expose the tourbillon. The watch is presented on an 18K white gold Antoine Preziuso buckle and is noted as water-resistant.

Antoine Preziuso Calibre T21 Gibeon Meteorite Tourbillon No. 1, showing the meteoritic case texture and dial aperture.
Antoine Preziuso Calibre T21 Gibeon Meteorite Tourbillon No. 1, showing the meteoritic case texture and dial aperture. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Tourbillon wristwatch
Maker / attribution
Antoine Preziuso
Reference
Calibre T21
Catalogue / lot identifier
82
Source-reported date
2005
Source-reported place
Switzerland
Source-reported serial
No. 1

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 Construction

The watch is housed in a two-body case that has been precision-milled from a single piece of Gibeon meteorite. The case design incorporates curved and straight lugs and a wide inclined bezel. The case back is constructed from brushed stainless steel and features a transparent display secured by six screws, revealing the movement within.

The dial is finished in black and is set with large luminous Arabic numerals. A significant feature is the cut-away lower third, which serves to display the one-minute tourbillon regulator situated beneath a polished steel bridge. Luminous feuille hands indicate the time. The dial is signed, and the watch is completed by an 18K white gold Antoine Preziuso buckle.

Evidence for this section
  • “precision-milled from a single piece of the ?Gibeon? meteorite”
  • “brushed stainless steel transparent case back with 6 screws”
  • “the lower third cut-away to view the one-minute tourbillon regulator”
  • “18K white gold Antoine Preziuso buckle”

Movement and Escapement

The timepiece is driven by the Calibre T21, a movement characterized by its rhodium-plated surfaces and detailed hand-engraving depicting stars and a comet. The movement comprises 25 jewels, four of which are mounted in screwed gold chatons. It utilizes a lateral lever escapement to manage the one-minute tourbillon regulator.

The tourbillon assembly features an A-shaped polished steel carriage. The power is supplied through twin barrels, and the balance system includes a monometallic balance, a shock absorber, and a self-compensating flat balance spring.

Evidence for this section
  • “Cal. T21, rhodium-plated and hand-engraved with stars and comet”
  • “lateral lever escapement with one-minute tourbillon regulator with ?A?- shaped polished steel carriage”
  • “25 jewels, 4 in screwed gold chatons”
  • “twin barrels”

Signatures and Provenance

The watch is signed on both the dial and the movement. It is identified as No. 1, indicating its status as the first piece of this specific series. The watch is classified as a unique, gentleman's wristwatch made by Antoine Preziuso in Geneva.

The auction records list the object as property of a Swiss collector. The provided documentation includes a formal grading of the watch components, evaluating the case and movement as 'Very good', the dial as 'As new', and the hands as original.

Evidence for this section
  • “Antoine Preziuso, Genève, ?Calibre T21 - Gibeon Meteorite ? Tourbillon?, No.1.”
  • “Dial and movement signed.”
  • “Property of a Swiss Collector”
  • “Grading System Grade: Case: 2 Very good Movement: 2 Very good Dial: 1-01 As new”

Open research questions

  • Are there any recorded technical deviations between this 'No. 1' unit and subsequent examples of the Calibre T21?
  • Does the 'A' shape of the carriage have a specific symbolic or mechanical intent related to the 'Antoine' signature?

Source evidence

Recorded claims and source quotations for Antoine Preziuso Calibre T21 Gibeon Meteorite Tourbillon No. 1
FieldSource-reported valueSource quotation
MakerAntoine Preziuso“Antoine Preziuso, Genève”
Year of production2005“Made in 2005”
Case materialGibeon meteorite“precision-milled from a single piece of the ?Gibeon? meteorite”
Movement caliberT21“Cal. T21”
Buckle material18K white gold“18K white gold Antoine Preziuso buckle”
Case diameter40 mm“Diam. 40 mm.”
Jewel count25“25 jewels”

Visible details

  • Case surface displays distinct Widmanstatten crystalline patterns
  • Tourbillon carriage is visible through a dial cut-away
  • Crown and case bezel share matching textured meteoritic finish

Research qualifications

  • Condition reports are provided by the auction house and not independently verified
  • The claim of exclusivity as a unique piece is as stated by the source

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

Consulted source

'Calibre T21 - Gibeon Meteorite - Tourbillon No.1' Antoine Preziuso, Genève, 'Calibre T21 - Gibeon Meteorite ' Tourbillon', No.1. Made in 2005. Very fine and unique, large, water-resistant, gentleman's wristwatch, made from the Gibeon meteorite, with one-minute tourbillon regulator and an 18K white gold Antoine Preziuso buckle.

Reviewed 2026-10-26 · Record 93e1db2ff7

Terms in this record

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

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