Eterna 970S: A Hidden Gem for Vintage Enthusiasts
The Eterna Caliber 970S stands as a pinnacle of mid-20th-century Swiss horology, captivating vintage watch lovers and hobbyist watchmakers with its robust engineering and timeless reliability. Produced primarily in the 1950s and 1960s, this manual-wind movement powered countless Eterna dress and sports watches, earning praise for its precision and serviceability.
Historical Context
Introduced post-World War II, the 970S emerged during Eterna’s golden era of innovation, following their pioneering ball-bearing automatic rotors. It reflects the brand’s shift toward high-beat, slim-profile calibers for elegant cases. Collectors prize serviced examples for their smooth operation and historical ties to Eterna’s Granville and Continental lines.
Technical Specifications
Type: Manual wind, three-hand movement
Jewels: 17
Diameter: 11.75 lignes (26.4 mm)
Height: 3.45 mm
Frequency: 19,800 vph (5.5 Hz beats/hour)
Power reserve: Approximately 42-48 hours
Balance: Glucydur with flat Nivarox hairspring
Shock protection: Eterna proprietary system
Functions: Hours, minutes, central seconds
Finish: Perlage on bridges, blued screws
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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