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The Encyclopedia of Horology

Wristwatch · Flyback chronograph

Vixa Type 20 military flyback chronograph, ref. 5100-54

Partially verified

This Vixa Type 20 military flyback chronograph, reference 5100-54, is dated by the seller to 1954 and reported to have been issued to the French Air Force. It features a three-piece stainless steel case measuring 39 mm in diameter (41 mm with crown and pushers) paired with a bidirectional fluted rotating bezel marked with a red indicator index. The black dial displays Arabic numerals, two subsidiary registers, and luminous hands, marked 'VIXA TYPE 20' and 'ANTIMAGNETIC'. According to the seller, the watch houses a manual-winding Hanhart caliber 4054 mechanical movement offering a flyback function and a 30-minute register.

Oblique view of the Vixa Type 20 chronograph showing the fluted bezel with red index, pushers, and black dial
Oblique view of the Vixa Type 20 chronograph showing the fluted bezel with red index, pushers, and black dial — Pascal Karp Watches Expertise / Proantic. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.proantic.com
Category
Wristwatch · Flyback chronograph
Maker / attribution
Vixa
Reference
5100-54
Catalogue / lot identifier
1691250
Source-reported date
1954
Country
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 Construction and Exterior Hardware

Direct observation documents a three-piece steel case featuring brushed lugs, two pump pushers, and a winding crown, fitted to a brown leather strap displayed on a stand. A fluted bidirectional bezel sits atop the case, distinguished by a red rectangular indicator index at the 12 o'clock position.

The seller describes the case as a 'Paramagnetic, three-piece stainless steel case, registered screw-down case back' with a 'bidirectional fluted rotating bezel'. Stated dimensions from the listing are 39 mm in diameter (41 mm including crown and pushers) by 46 mm (described in text as 'lug width', though corresponding physically to overall length).

Evidence for this section
  • “Three-piece steel case with brushed lugs, two pump pushers, and a winding crown.”
  • “Fluted bidirectional bezel with a distinct red rectangular indicator mark at 12 o'clock.”
  • “Mounted on a brown leather strap displayed on a stand.”
  • “Paramagnetic, three-piece stainless steel case, registered screw-down case back, bidirectional fluted rotating bezel.”
  • “Dimensions: 39 mm (41 mm including crown and pushers) x 46 mm (lug width).”

Dial Display and Sub-Registers

Visual examination confirms a black dial marked with Arabic numerals, two sub-registers representing continuous seconds and a minute counter, and typography reading 'VIXA TYPE 20' and 'ANTIMAGNETIC'.

The seller describes the display as an 'Original black dial with two subdials, Arabic numerals, and luminous hands (originally)'. The parenthetical remark in the source denotes that the luminosity reflects its stated original configuration rather than verified active luminescence.

Evidence for this section
  • “Black dial with Arabic numerals, two sub-registers (continuous seconds and minute counter), signed 'VIXA TYPE 20' and 'ANTIMAGNETIC'.”
  • “Original black dial with two subdials, Arabic numerals, and luminous hands (originally).”

Reported Movement and Military Context

The seller describes the watch as housing a 'Mechanical movement with manual winding, Hanhart caliber 4054, flyback function and minute addition (30 min)'.

In addition, the dealer catalogues the watch as 'Issued to the French Air Force' with reference '5100-54', further stating: 'Original German components, supplied to France as war reparations.' Because neither the movement caliber nor the case back markings are visible in the provided image, these mechanical and historical claims remain unverified dealer statements.

Evidence for this section
  • “Vixa Type 20 military chronograph, reference 5100-54.”
  • “Issued to the French Air Force.”
  • “Mechanical movement with manual winding, Hanhart caliber 4054, flyback function and minute addition (30 min).”
  • “Original German components, supplied to France as war reparations.”

Open research questions

  • What military markings or Fin de Garantie (FG) contract dates, if any, are engraved on the screw-down case back?
  • Does direct examination of the uncased movement confirm the Hanhart caliber 4054 identification and flyback mechanism?
  • What is the condition and composition of the material on the dial numerals and hands relative to the dealer's note of '(originally)' luminous?

Source evidence

Recorded claims and source quotations for Vixa Type 20 military flyback chronograph, ref. 5100-54
FieldSource-reported valueSource quotation
Reference5100-54“reference 5100-54”
IssueFrench Air Force“Issued to the French Air Force”
Movement caliberHanhart caliber 4054“Hanhart caliber 4054”
Diameter39 mm (41 mm including crown and pushers)“Dimensions: 39 mm (41 mm including crown and pushers)”
BezelBidirectional fluted rotating bezel“bidirectional fluted rotating bezel”
Case dimensions39 mm (41 mm including crown and pushers) x 46 mm (source notes lug width)“Dimensions: 39 mm (41 mm including crown and pushers) x 46 mm (lug width).”
Case back descriptionRegistered screw-down case back (source-reported)“registered screw-down case back”
Components originOriginal German components supplied to France as war reparations (source-reported)“Original German components, supplied to France as war reparations.”

Visible details

  • Three-piece steel case with brushed lugs, two pump pushers, and a winding crown.
  • Fluted bidirectional bezel with a distinct red rectangular indicator mark at 12 o'clock.
  • Black dial with Arabic numerals, two sub-registers (continuous seconds and minute counter), signed 'VIXA TYPE 20' and 'ANTIMAGNETIC'.
  • Mounted on a brown leather strap displayed on a stand.

Research qualifications

  • Movement caliber and case back markings are reported by the dealer but not visible in the provided image.
  • Luminous hands and indices are noted by the dealer as having originally been luminous.
  • French Air Force provenance is dealer-reported.

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

Consulted source

Proantic: Vixa Flyback Chronograph Type 20 French Air Force -1954-

Reviewed 2026-10-21 · Record 39e8c92865

Terms in this record

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