Eterna 965S: A Vintage Marvel for Enthusiasts
The Eterna Calibre 965S stands as a pinnacle of mid-20th-century Swiss horology, captivating vintage watch lovers and hobbyist watchmakers with its robust engineering from the 1940s. Revered for reliability in Eterna’s dress and military-inspired models, this manual-wind movement embodies post-war precision, offering smooth operation ideal for restoration projects.
Historical Context
Introduced around the 1940s, the 965S powered elegant Eterna timepieces during an era of innovation. Collectors prize it for its clean architecture and durability, often found in 14k or 18k gold cases. Hobbyists appreciate its serviceability, with parts still available through specialist suppliers.
Technical Specifications
Type: Manual wind, three-hand movement
Jewels: 17 or 19 jewels for reduced friction
Diameter: 11.5”’ (26mm), fitting slim cases
Height: Approximately 3.5mm, ultra-thin profile
Frequency: 18,000 vph (2.5 Hz) for balanced accuracy
Power reserve: 40-45 hours on full wind
Balance: Glucydur with flat hairspring
Shock protection: Incabloc or similar system
Finish: Blued screws, perlage on plates
Key Features
Central seconds with hacking capability in later variants
Small seconds subdial option in select 965 family versions
Bi-directional winding via efficient gear train
Adjustable regulator for fine-tuning by hobbyists
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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