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The Encyclopedia of Horology

Wristwatch · Jump hour automatic wristwatch

Breguet Reference 3420 BA Automatic Jump Hour Wristwatch

Partially verified

This round 18k gold automatic wristwatch from Breguet, reference 3420 BA, dates to circa the 1990s. The source describes a 36mm round case with a snap-on back bearing numbers 71/800 and 2517 B. Its white enamel dial features an aperture at 12 o'clock for jumping hours, surrounded by an Arabic minute track swept by a single blued Breguet hand. Bonhams notes the watch is powered by a 25-jewel Calibre 562 automatic movement numbered 236, accompanied by an 18k gold buckle.

Front three-quarter view of the Breguet jump hour wristwatch on leather strap
Front three-quarter view of the Breguet jump hour wristwatch on leather strap — Bonhams. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bonhams.com
Category
Wristwatch · Jump hour automatic wristwatch
Maker / attribution
Breguet
Reference
3420 BA
Catalogue / lot identifier
1078
Source-reported date
c. 1990s
Country
Not established
Source-reported serial
2517 B

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

Identity and Case Construction

This jump hour wristwatch is catalogued under reference 3420 BA with an approximate date of circa the 1990s. The source describes the case as round, 18k gold, and measuring 36mm, fitted with a snap-on case back bearing the numbers '71/800' and '2517 B'.

Signatures are stated by the auction house to be present on the case, dial, movement, strap, and buckle. The lot was catalogued as having no accompaniments, and the case back itself is not visible in the provided image.

Evidence for this section
  • “Ref: 3420 BA, c. 1990s”
  • “Case: Round, snap on case back, no. 71/800, 2517 B”
  • “Signed: Case, dial, movement, strap and buckle”
  • “Accompaniments: None”

Dial Display and Visible Features

The dial is described by the cataloguer as white enamel. Visual observation records an aperture positioned at 12 o'clock revealing the jumping hour display, along with an Arabic numeral minute track and a single blued Breguet hand.

External physical features visible on the watch include a winding crown set with a dark cabochon gem and an alligator-pattern leather strap fitted with a buckle.

Evidence for this section
  • “Dial: White enamel”
  • “Aperture positioned at 12 o'clock revealing the jumping hour display.”
  • “White enamel dial with an Arabic numeral minute track and a blued Breguet hand.”
  • “Winding crown set with a dark cabochon gem.”

Movement Details and Strap Policy

The movement is not visible in the provided photograph. Bonhams describes the movement as a 25-jewel automatic Calibre 562, numbered 236.

The cataloguer identifies the strap material as a regulated species. Footnotes caution that wristbands made from protected or endangered species are for display only and subject to removal prior to property release or shipment, accompanied by an 18k gold buckle.

Evidence for this section
  • “Movement: Cal. 562, 25-jewel automatic, no. 236”
  • “Strap/Bracelet: Regulated species”
  • “Buckle/Clasp: 18k gold buckle”
  • “Please note that wristbands made of material of endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only.”

Open research questions

  • What base caliber was used by Breguet to construct Calibre 562?
  • Does the inscription 'no. 71/800' indicate an official limited edition of 800 pieces for reference 3420 BA?
  • What specific mineral or gemological material constitutes the dark cabochon set into the crown?

Source evidence

Recorded claims and source quotations for Breguet Reference 3420 BA Automatic Jump Hour Wristwatch
FieldSource-reported valueSource quotation
Reference3420 BA“Ref: 3420 BA, c. 1990s”
MovementCal. 562, 25-jewel automatic, no. 236“Cal. 562, 25-jewel automatic, no. 236”
DialWhite enamel“Dial: White enamel”
CaseRound, snap on case back, no. 71/800, 2517 B“Round, snap on case back, no. 71/800, 2517 B”
Size36mm“Size: 36mm”
Buckle18k gold buckle“Buckle/Clasp: 18k gold buckle”
AccompanimentsNone“Accompaniments: None”
SignaturesCase, dial, movement, strap and buckle“Signed: Case, dial, movement, strap and buckle”
Strap/BraceletRegulated species“Strap/Bracelet: Regulated species”

Visible details

  • Aperture positioned at 12 o'clock revealing the jumping hour display.
  • White enamel dial with an Arabic numeral minute track and a blued Breguet hand.
  • Winding crown set with a dark cabochon gem.
  • Fitted to a dark alligator-pattern leather strap.

Research qualifications

  • Movement condition and case back inscriptions are not visible in the supplied photograph.
  • The source notes wristbands of regulated or endangered species are for display only and subject to removal prior to release or shipment.

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

Consulted source

Bonhams : BREGUET. A FINE 18K GOLD AUTOMATIC JUMP HOUR WRISTWATCHRef: 3420 BA, c. 1990s

Reviewed 2026-10-21 · Record 6e3966e9e2

Terms in this record

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

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