The Eterna 1504 calibre stands as a pinnacle of 1960s Swiss engineering, captivating vintage watch enthusiasts and hobbyist watchmakers with its innovative automatic winding and slim profile. Developed by Eterna, this movement powered elegant dress watches and early sports models, blending reliability with a distinctive central rotor design. Its modular architecture influenced later calibres, making it a favorite for restoration projects due to accessible parts and smooth operation.
Historical Context
Introduced around 1965, the Eterna 1504 emerged during the brand’s golden era of self-winding innovations. It built on the Eterna-Matic 3000 family, prioritizing thinness for versatile case designs. Collectors prize it for its role in mid-century icons, often found in KonTiki divers and dress watches, evoking the precision of an era before quartz dominance.
Technical Specifications
Diameter: 27.5 mm (12 ligne)
Height: 4.8 mm
Jewels: 25
Frequency: 18,000 vph (2.5 Hz)
Power Reserve: Approximately 40-45 hours
Winding: Bidirectional central rotor with ball-bearing system
Functions: Hours, minutes, central seconds, date at 3 o’clock
Shock Protection: Incabloc system
Regulation: Free-sprung balance with swan-neck fine adjustment
Finish: Geneva stripes on bridges, blued screws
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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