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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Breguet Transatlantique Type XX Reference 3820

Partially verified

This Breguet Transatlantique Type XX, reference 3820, is a self-winding stainless steel chronograph wristwatch sold in August 2000. The watch features a fly-back chronograph mechanism with subsidiary registers for 12-hour and 30-minute timing, alongside a date aperture. Its case measures 39 mm in diameter and 15 mm in thickness, constructed with a combination of polished and brushed surfaces, a bi-directional revolving graduated bezel, a reeded band, and a screwed-down case back and crown. The black dial displays luminous Arabic numerals with steel dot indexes and luminous steel baton hands. It is powered by the Caliber 582Q movement, a rhodium-plated mechanism featuring 25 jewels, a straight-line lever escapement, and a monometallic balance adjusted to five positions. The watch is presented on an integrated stainless steel link bracelet with a concealed deployant clasp.

Breguet Transatlantique Type XX, Reference 3820, in stainless steel.
Breguet Transatlantique Type XX, Reference 3820, in stainless steel. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Breguet
Reference
3820
Catalogue / lot identifier
350
Source-reported date
2000
Source-reported place
Switzerland
Source-reported serial
50216

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 Breguet Transatlantique Type XX is housed in a three-body stainless steel case measuring 39 mm in diameter. The exterior is characterized by a mix of polished and brushed finishes, featuring a distinctively reeded band. It is equipped with a bi-directional revolving graduated bezel, a screwed-down crown, and a screw-down case back to ensure water resistance. The watch is protected by a domed sapphire crystal.

The black dial is designed for legibility with luminous Arabic numerals and steel dot indexes. It includes subsidiary dials for constant seconds, a 30-minute chronograph register, and a 12-hour register. A date aperture is positioned at the 6 o'clock mark. The time is indicated by luminous steel baton hands,

Evidence for this section
  • “Three-body, polished and brushed, bi-directional revolving graduated bezel, reeded band, screwed-down case back and crown, domed sapphire crystal.”
  • “Black with luminous Arabic numerals and steel dot indexes, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer minute division, aperture for the date.”

Movement and Mechanics

The timepiece is powered by the Caliber 582Q, a self-winding mechanical movement. This caliber features rhodium-plated plates decorated with fausses cotes. The chronograph mechanism is a fly-back type, operated by round push-buttons. The movement is constructed with 25 jewels and utilizes a straight-line lever escapement.

Technical precision is managed by a monometallic balance, which has been adjusted to heat, cold, isochronism, and five positions. The system includes a shock-absorber and a self-compensating flat balance spring to maintain performance. The dial, case, and movement are all signed by Breguet, confirming the integrity of the watch assembly.

Evidence for this section
  • “M. Cal. 582Q, rhodium-plated, fausses cotes decoration, 25 jewels, straight line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions”
  • “Dial, case and movement signed.”

Condition and Provenance

According to the provided auction details, this lot was sold in August 2000. The watch is currently fitted with a Breguet stainless steel link bracelet that features a concealed deployant clasp. The total approximate length of the piece is 180 mm.

The case is graded as '3-9', with some visible scratching noted. Conversely, the dial is described as 'as new', and the hands are confirmed as original to the timepiece.

Evidence for this section
  • “Movement: 3* Good Overhaul recommended, at buyer's expense”
  • “Case: 3-9 Good Scratched”
  • “Dial: 1-01 As new”

Open research questions

  • What are the specific operational differences between the Caliber 582 and 582Q versions?
  • Are the service records available for the 2000 purchase date to verify if the recommended overhaul has been previously addressed?

Source evidence

Recorded claims and source quotations for Breguet Transatlantique Type XX Reference 3820
FieldSource-reported valueSource quotation
MakerBreguet“Breguet, 'Transatlantique - Type XX'”
Case Reference3820“Ref. 3820”
MovementCaliber 582Q“M. Cal. 582Q”
Diameter39 mm“Diam. 39 mm”
Case FeaturesPolished and brushed steel with reeded band“Three-body, polished and brushed, bi-directional revolving graduated bezel, reeded band”
CrystalDomed sapphire“domed sapphire crystal”
Movement DecorationRhodium-plated, fausses cotes“rhodium-plated, fausses cotes decoration”
Jewel count25“25 jewels”

Visible details

  • Bi-directional revolving graduated bezel
  • Integrated stainless steel link bracelet with concealed clasp
  • Date aperture at the 6 o'clock position
  • Subsidiary dials for constant seconds and chronograph registers

Research qualifications

  • The auction description indicates that an overhaul is recommended at the buyer's expense
  • The auction report notes that the case shows signs of scratching

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

Consulted source

Stainless Steel, 'Type XX' Breguet, 'Transatlantique - Type XX', case No. 50216, Ref. 3820. Sold on August, 2000. Very fine, self-winding, water-resistant, stainless steel wristwatch with fly-back round button chronograph, registers, date and a Breguet stainless steel link bracelet with concealed deployant clasp. Accompanied by guarantee, fitted box and booklets.

Reviewed 2026-10-26 · Record 050ba101b3

Terms in this record

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

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