The Eterna Calibre 957 stands as a pinnacle of mid-20th-century Swiss horology, cherished by vintage watch enthusiasts and hobbyist watchmakers for its innovative self-compensating balance and robust construction. Produced from the late 1940s through the 1950s, this manual-wind movement powered elegant dress watches, offering exceptional accuracy and durability that rivaled top competitors.
Historical Context
Emerged post-World War II as Eterna’s answer to temperature-sensitive timekeeping challenges.
Featured the groundbreaking Incabloc shock protection system, a first for Eterna, enhancing resilience against daily jolts.
Commonly found in slim, refined cases, appealing to collectors seeking understated 1950s elegance.
Technical Specifications
Type: Manual wind, 17 jewels.
Diameter: 11.75 lignes (26.40 mm).
Height: 3.45 mm, ideal for thin profiles.
Frequency: 18,000 vph (2.5 Hz), balancing smoothness and longevity.
Power reserve: Approximately 42-48 hours.
Balance: Self-compensating Glucydur with flat Nivarox hairspring for temperature stability.
Shock protection: Incabloc, pioneering anti-shock mounting.
Finishing: Polished bridges with perlage, signed Eterna plates.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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