Eterna 1481: A Vintage Automatic Gem
Vintage watch enthusiasts and hobbyist watchmakers prize the Eterna 1481 calibre for its robust engineering from the 1960s golden era of Swiss horology. Launched around 1963 as part of Eterna’s Eterna-Matic family, this automatic movement powered iconic models like the Centenaire 2000, blending reliability with elegant finishing that appeals to restorers today.
Historical Context
Introduced during Eterna’s push into self-winding innovations, the 1481 evolved from earlier calibres like the 1470 and 1480. Produced into the late 1960s, it featured bidirectional rotor winding via a smooth, low-friction system—perfect for daily wear. Collectors value its “K” variant for signed bridges and perlage decoration, often found in gold-plated or steel-cased dress watches around 34-36mm.
Technical Specifications
Diameter: 12.5 lignes (approximately 28mm)
Height: Around 5mm, slim for vintage cases
Jewels: 21, reducing friction in high-wear pivots
Frequency: 18,000 vph (5 Hz), balancing smoothness and durability
Power Reserve: Approximately 45-47 hours
Functions: Time-only with central seconds; some with date
Winding: Bidirectional rotor, bi-directional mainspring barrel
Shock Protection: Eterna-U system for resilience
Balance: Glucydur with Nivarox hairspring
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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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