The ETA 2870 is a reliable automatic movement from the ETA 2800 family, prized in vintage Swiss watches for its robustness. Produced primarily in the 1970s-1980s, it powers mid-range timepieces with smooth sweeping seconds.
Key Specifications
Type: Automatic self-winder with central rotor and bi-directional winding.
Dimensions: 11.5 lignes (25.60mm diameter), 5.35-5.50mm thick.
Jewels: 17, 21, or 25, depending on grade.
Beat rate: 28,800 A/h (4Hz) for precise timekeeping.
Power reserve: Approximately 38-44 hours.
Functions and Features
This movement offers hours, minutes, central sweep seconds, and often a date complication. It supports hand-winding and features like Incabloc shock protection in higher grades. Part of ETA’s workhorse 2800/2824 lineage, it shares DNA with modern staples but in a slimmer profile suited for dress watches.
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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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