Longines Twenty-Four Hours Single Push-Piece Chronograph

Prestigious Swiss watch brand Longines has been based in the market town of St. Imier since it was founded in 1832. As a tribute to its precious heritage, the Swiss watch producer takes its inspiration from the models in its museum to design watches that reflect its vast know-how. The latest addition to the Heritage collection is The Longines Twenty-Four Hours Single Push-Piece Chronograph. Housing an exclusive calibre, this single push-piece chronograph is a re-issue of an earlier pilot’s watch and displays the time on a 24-hour scale.

The diameter of the original model, a magnificent 47.50 mm, has been reproduced, as well as the dial with its 24-hour scale, available in black or silver. The steel case has a closed back, decorated with Longines’ famous hourglass symbol, in use since 1889 and the oldest logo still in active use in its original form in the international registers of the World Intellectual Property Organisation. Each watch in this exceptional series is numbered.

The model on which this new creation is based was fitted with a calibre originally intended for a pocket watch and later adapted for use in a wrist-watch. The Longines Twenty-Four Hours Single Push-Piece Chronograph houses an L789 self-winding, mechanical movement. This new column-wheel chronograph calibre, produced exclusively for Longines, is an adaptation of Longines’ own single push-piece movement.

It features a chronograph function, displays the time on a 24-hour scale, and has a small seconds at 18o’clock plus a date aperture at 12 o’clock, at the bottom of the dial. It is fitted on a black or brown alligator strap to match the colour of the dial.

Technical details
Model: The Longines Twenty-Four Hours Single Push-Piece Chronograph
Reference number: L2.797.4.53/73.x

Movement
Self-winding, mechanical movement with a single push-piece and column-wheel chronograph mechanism
Calibre L789.2 (ETA A08.L21)
13¼ lines, 27 jewels, 28,800 vibrations per hour
54-hour power reserve

Functions
Hours (24-hour scale), minutes, small seconds, date
Chronograph function

Case 
Round, steel, Ø 47.50 mm
Single push-piece integrated into the crown
Sapphire glass treated with several layers of anti-reflection coating
Water-resistant: To 3 bars (30 meters)

Dial
Silvered, with blackouter minute ring and 24-hour scale coatedwith Super-LumiNova®
Black, with white outer minute ring and 24-hour scale coated with    Super-LumiNova®
Small seconds at 18 o’clock
Date aperture at 12 o’clock (bottom of the dial)

Hands
Blued or rhodium-plated steel

Strap
Brown or black alligator with buckle (with aviator’s extension)

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