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The Encyclopedia of Horology

Wristwatch · Chronograph

Leonidas chronograph

Partially verified

This Leonidas chronograph is a manual-winding wristwatch from the 1940s, featuring the Landeron 48 movement. The watch is constructed with a stainless steel case measuring 35mm in diameter, excluding the winding crown, and 42.50mm in length including the lugs. The light grey dial displays two sub-dials at the three o'clock and nine o'clock positions, representing minutes and seconds respectively. The dial is printed with black Arabic numeral hour markers and features an outer blue scale for telemeter and tachymeter functions. The hands are designed in a black leaf style. The caseback is inscribed with external engraving denoting the base metal back material, while internal markings indicate Swiss origin and a serial number of 732085. The movement operates with 17 jewels and a power reserve of 41 hours. The watch is currently fitted with a brown leather strap, with a lug width of 18mm.

Front view of the Leonidas chronograph, showing the dial, sub-dials, and blue telemeter and tachymeter scales.
Front view of the Leonidas chronograph, showing the dial, sub-dials, and blue telemeter and tachymeter scales. — Laurent Fine Watches. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
laurent-fine-watches.myshopify.com
Category
Wristwatch · Chronograph
Maker / attribution
Leonidas
Reference
Not recorded
Catalogue / lot identifier
Leonidas-Chrono-A-V-12-13-2023
Source-reported date
1940's
Source-reported place
Switzerland
Source-reported serial
732085

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

Dial and Hands

The right sub-dial at the three o'clock position records elapsed minutes, while the left sub-dial at the nine o'clock position functions for running seconds. Hour markers are presented in black Arabic numerals. A prominent feature of the dial is the external peripheral track, finished in blue, which provides functionality for both telemeter readings up to one kilometer and a tachymeter scale reaching 1000.

The time is indicated by black hands styled in a leaf motif. The dial surface shows signs of age, consistent with the period of production. The overall legibility of the chronograph functions is supported by the clear contrast between the dark markings and the lighter dial base.

Evidence for this section
  • “Beautiful light grey dial Leonidas watch with two sub dials, three o’clock for the minutes and nine of clock for the seconds.”
  • “On the outer of the dial comes a blue telemeter up to one kilometer and tachymeter up to 1000.”
  • “Hands are black with “Leaf” style.”

Movement and Technical Specifications

The timepiece is powered by a manual-winding movement identified as the Landeron 48 caliber. This movement is configured with 17 jewels and provides a power reserve of 41 hours. It operates at a frequency of 18,000 vibrations per hour (A/h).

According to the provided data, the Landeron 48 movement was produced between 1937 and 1970.

Evidence for this section
  • “Manual winding movement with caliber Landeron 48 with 17 jewels, 18,000 A/h and 41 hours of power reserve.”
  • “The movement was produced from 1937 to 1970.”

Case and Inscriptions

The case is manufactured from stainless steel, although the external engraving on the caseback specifies 'Stainless Steel - Back Base Metal,' indicating that while the caseback is stainless steel, the main case body is composed of a base metal. The dimensions are measured at 35mm in diameter excluding the crown, with an overall length of 42.50mm including the lugs. The distance between the lugs for the strap is 18mm.

Internal documentation found on the watch components includes the word 'Swiss' and the serial number 732085. The watch is paired with a brown leather strap as part of its current configuration.

Evidence for this section
  • “It is a stainless back case with engraved outside “Stainless Steel - Back Base Metal” and inside “Swiss - 732085”.”
  • “SIZE – DIAMETER EXCLUDING WINDING CROWN: 35MM”
  • “Length including lugs: 42.50mm”

Open research questions

  • Does the serial number 732085 confirm a specific year of manufacture within the 1940s?
  • Are the black 'Leaf' hands original to this specific model?

Source evidence

Recorded claims and source quotations for Leonidas chronograph
FieldSource-reported valueSource quotation
MakerLeonidas“BRAND: LEONIDAS”
MovementLanderon 48“caliber Landeron 48”
Diameter35mm“SIZE – DIAMETER EXCLUDING WINDING CROWN: 35MM”
Movement jewels17“17 jewels”
Serial number732085“inside “Swiss - 732085””
Caseback markingStainless Steel - Back Base Metal“engraved outside “Stainless Steel - Back Base Metal””
Lug width18mm“Width between lugs is 18mm”

Visible details

  • Black 'Leaf' style hands
  • Blue printed telemeter and tachymeter scales
  • Two-register dial configuration
  • Stainless steel case construction

Research qualifications

  • Origin of case material is described as base metal on the caseback
  • Exact production year within the 1940s is not specified

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

Consulted source

ساعت کرنوگراف Leonidas با کالیبر Landeron 48 – دهه ۱۹۴۰

Reviewed 2026-11-02 · Record 071a7787e7

Terms in this record

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