Eterna Calibre 39 Movement: Functions, History, and Interesting Facts

The Eterna Calibre 39 is a highly innovative mechanical automatic movement developed by the Swiss brand Eterna, known for its pioneering technological advances and long tradition of producing quality watches. This caliber represents a significant step forward in thin and precise automatic mechanisms.

History and Development

Founded in 1856, Eterna is one of the oldest and most respected Swiss watch manufacturers. The Calibre 39 was developed to create a modern, reliable, and high-performance automatic movement with a low profile. It is the result of collaboration between Eterna and other Swiss specialists, including manufacturers and designers. Introduced in 2007, it has since undergone several variants and improvements.

Technical Specifications and Functions

• Automatic mechanical movement

• Frequency: 28,800 vibrations per hour (4 Hz)

• Power reserve: approx. 65 hours, above average for automatic calibers

• Diameter: approx. 30.6 mm

• Thickness: approx. 3.6 mm – very slim profile allowing elegant watch design

• Highly efficient automatic winding with ball bearings

• Displays hours, minutes, seconds, and date

• Modular construction allowing easy customization of functions (e.g., chronograph, date complications)

• High-quality Swiss craftsmanship focusing on reliability and precision

Interesting Facts

• The Calibre 39 is based on technology and know-how developed by Eterna throughout its history, including innovations in automatic winding using ball bearings.

• Thanks to its modular design, it is highly flexible and used in a variety of models ranging from simple three-hand watches to more complex chronographs.

• The 65-hour power reserve enables extended wearing without frequent winding.

• Its slim profile allows the creation of elegant watches with low case height, enhancing wearing comfort.

• The Calibre 39 has been praised for its robustness, accuracy, and technological advancement within the segment of mechanical automatic movements.

Summary

The Eterna Calibre 39 is an advanced and reliable automatic movement that combines traditional Swiss quality with modern technologies and flexibility. Its high precision, long power reserve, and elegant design make it an attractive choice for enthusiasts of quality mechanical watches.

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