Eterna Caliber 1500: A Vintage Gem for Enthusiasts
The Eterna Caliber 1500 stands as a pinnacle of mid-20th-century Swiss horology, cherished by vintage watch collectors and hobbyist watchmakers for its robust engineering and hallmark ball-bearing rotor. Produced primarily in the 1960s and early 1970s, this automatic movement powered iconic Eterna-Matic models, blending reliability with innovative design.
Historical Context
Introduced during Eterna’s golden era of self-winding innovations, the Caliber 1500 evolved from the pioneering Eterna-Matic series that debuted in 1948. Its five micro ball bearings—each just 0.65mm in diameter—minimized rotor friction, enabling smooth bidirectional winding and exceptional power reserve. Vintage enthusiasts prize it for use in dress watches and chronometers, like the rare Eterna-Matic 3000, where its clean finishing and durability shone.
Technical Specifications
Type: Automatic mechanical with central rotor and sweep seconds
Jewels: 25
Diameter: 11.5 lignes (25.6 mm)
Height: Approximately 4.6 mm
Beat rate: 21,600 vph (3 Hz)
Power reserve: 40-45 hours
Functions: Time-only (hours, minutes, seconds); variants with date or day-date
Rotor: Bi-directional, mounted on 5 ball bearings
Balance: Glucydur with flat Nivarox hairspring
Shock protection: Eterna-U system
Finishing: Perlage on bridges, polished screws
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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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