Longines Twenty-Four Hours

Aviator design with a strong identity

The design of the Twenty-Four Hours follows the model of classic cockpit instruments: a generously dimensioned case with a clearly legible dial, large Arabic numerals from 1 to 24, a railway-style minute track, and bold, luminous hands. The watch displays the time in a 24-hour format—the hour hand circles the dial only once per day. This function was essential for pilots to avoid confusion between day and night.

The stainless steel case measures 47.5 mm in diameter—a clear nod to the large pilot's glove watches of the past. Despite its size, the watch remains wearable thanks to its ergonomically shaped case and rounded lugs. A domed sapphire crystal with an anti-reflective coating enhances its vintage character while providing reliable protection for everyday wear.

The dial is usually matte black, with contrasting numerals and luminous elements. The whole thing is complemented by a robust leather strap with decorative stitching – true to the aviator look.

Mechanism with 24-hour complication

Inside the Twenty-Four Hours is the Longines Caliber L704.3, based on the ETA A07.171 – a rare automatic caliber with a 24-hour display. The hour hand moves correspondingly slower across the dial, while the minute and second hands run at their usual pace. The power reserve is approximately 48 hours.

The movement is protected by a screwed-down stainless steel case back, which—like the historic original—does not have a viewing window. It has been specially regulated to ensure precise timekeeping despite its unusual display. Operation is easy via the easy-grip crown: winding is done by movement or manually, and the date can be set separately.

This technical feature makes the Twenty-Four Hours a rare, collectible watch – with real character, even in everyday use.

Collector's item with unique function

The Longines Twenty-Four Hours is available in limited numbers and is aimed at enthusiasts seeking something special. Its clean, functional appearance, historical heritage, and unusual time display make it an exceptional piece in the modern watch market.

Whether as a tribute to aviation history or as a statement of horological individuality, the Twenty-Four Hours is a model with character, personality, and relevance. For wearers who don't just want to know what time it is—but precisely what time of day they are.