Longines Ref. 5824 Chronostop oversized pilot's flyback chronograph wristwatch

Technical characteristics

Type

Chronograph

Calibre

Manual, cal. 12.68Z, 17 jewels

Reference

5824

Dimensions

47mm Diameter

Invoiced Date

11 April 1958

Place recorded

Switzerland

Movement Number

9'938'976

Case Inscription

Caseback stamped ח.א. followed by issue number 540

Maker / attribution

Longines

Design

Visible features

• Matte black dial with luminous Arabic numerals, inner track calibrated to 60 units, and subdial at 6 o'clock. • Central hands include a red-tipped chronograph hand and an additional central register hand. • Revolving wide steel bezel engraved with calibrated track markers and numerals. • Oversized fluted onion crown positioned at 3 o'clock and a single cylindrical pusher at 2 o'clock.

Dial and Timing Display

Visual examination confirms a matte black dial marked with luminous Arabic numerals, an inner track calibrated to 60 units, and a subsidiary dial located at 6 o'clock. The central hand assembly comprises a red-tipped chronograph hand and an additional central register hand. The auction essay describes the watch as operating with central chronograph registers. It states that the pusher at 2 o'clock serves two functions: pressing it lightly stops the chronograph mechanism, while depressing it further resets the chronograph.

Identity and Case Construction

This Longines reference 5824, catalogued as a Chronostop pilot's wristwatch, features a stainless steel case measuring 47mm in diameter. Direct visual observation reveals a revolving wide steel bezel engraved with calibrated track markers and numerals, an oversized fluted onion crown positioned at 3 o'clock, and a single cylindrical pusher at 2 o'clock. The catalog lists the piece as signed on the case, dial, and movement. The caseback is source-reported to be stamped with the Hebrew inscription 'ח.א.' (abbreviation for the Israeli Air Force) followed by issue number 540; however, this caseback marking is not visible in the provided primary front-facing photograph.

Movement and Archival Documentation

The movement is identified in the catalog specifications as a manual-wind calibre 12.68Z with 17 jewels, bearing movement number 9'938'976. As the movement is not visible in the provided image, internal condition, finishing, and movement markings remain unverified by direct observation. According to the catalog, an accompanying Longines Extract from the Archives confirms the watch was invoiced on 11 April 1958 to Scharfstein, their agent in Tel-Aviv at the time. The lot is further reported to be accompanied by flight logs and a letter from Israeli Air Force fighter pilot Baruch Halachmi outlining his career.

Identification

Reference

5824

Serial number

9'938'976

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.