Eterna 1489: A Vintage Automatic Gem
The Eterna 1489K calibre, introduced around 1963, powers iconic models like the Eterna-Matic 1000, captivating vintage watch enthusiasts and hobbyist watchmakers with its reliable automatic engineering. Derived from an ETA 2433 base but refined to Eterna’s exacting standards, this manual-wind family movement exemplifies Swiss precision from the mid-20th century. Its slim profile and robust construction make it a favorite for restoration projects.
Historical Context
Launched during Eterna’s golden era of automatic innovation, following milestones like the 1955 world’s thinnest automatic (Cal. 1429U).
Featured in 1960s-1970s dress watches, often in stainless steel or gold-capped cases around 34-35mm diameter.
Known for powering “5-star” or chronometer-grade variants, emphasizing Eterna’s ball-bearing rotor heritage.
Technical Specifications
Type: Automatic self-winding (some manual wind variants like 1475/1476 family).
Jewels: 17 or 21 (depending on grade; higher in premium versions).
Diameter: 12.5”’ (1475) to 13”’ (1476); ~27mm.
Height: Ultra-slim at ~4.5mm, ideal for thin cases.
Frequency: 18,000 vph (2.5 Hz), 21600 bph in tuned versions.
Power Reserve: ~40-45 hours.
Functions: Hours, minutes, central seconds, date quick-set.
Rotor: Bidirectional ball-bearing (Eterna’s patented low-friction design).
Adjustments: 3 positions standard; up to 5 in chronometer grades.
Shock Protection: Incabloc or equivalent.
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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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