The Eterna 1486 calibre stands as a pinnacle of mid-20th-century Swiss engineering, captivating vintage watch enthusiasts and hobbyist watchmakers with its robust construction and innovative features. Launched around 1964 as part of Eterna’s evolution from earlier 1475/1476 families, this manual-wind movement exemplifies the brand’s commitment to precision and durability in an era of rapid horological advancement.
Historical Context
Developed by Eterna, a storied Swiss manufacturer founded in 1856, the 1486K variant emerged during the 1960s quartz transition, prioritizing mechanical reliability.
Belongs to the 12.5 ligne family, bridging smaller 1475 (manual) and larger 1476 designs, often used in dress and sports watches.
Featured sweep second hand and quick-set date, adjustable via crown pulls, making it practical for daily wear.
Technical Specifications
Diameter: 12.5 lignes (approximately 28mm).
Height: Slim profile around 4.9mm, ideal for thinner cases.
Jewels: 21 jewels for reduced friction on high-wear pivots.
Frequency: 18,000 vibrations per hour (vph), balancing smoothness and longevity.
Power Reserve: Approximately 40-45 hours with Eterniflex mainspring.
Winding: Manual, bi-directional capability in some variants; Glucydur balance with flat Nivarox hairspring.
Shock Protection: Proprietary Eterna-U system for resilience against impacts.
Functions: Hours, minutes, sweep seconds, date window.
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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