The ETA 2824-2: A Horology Workhorse
The ETA 2824-2 stands as one of the most reliable automatic mechanical movements in Swiss watchmaking, produced since 1982 and derived from the Eterna Caliber 1427. Known for its robustness, versatility, and widespread use across brands like Tissot, Hamilton, and Longines, it powers countless mid-range timepieces with proven durability.
Key Specifications
Size: 25.6mm diameter (11.5 lignes), 4.6mm thick.
Jewels: 25, with bi-directional ball-bearing rotor.
Frequency: 28,800 beats per hour (4Hz), 38-42 hour power reserve.
Functions: Hours, minutes, sweeping seconds, date at 3:00; hacking seconds, hand-windable.
Grades and Accuracy
The movement comes in four grades, differing in adjustment positions, components, and precision:
Standard: ±12 to +30 sec/day (2 positions).
Elaboré: ±7 to +20 sec/day (3 positions).
Top: ±4 to +15 sec/day (5 positions, upgraded balance/hairspring).
Chronometer: COSC-certified, -4/+6 sec/day.
Most units are Standard grade, averaging ±12 sec/day, yet often outperform specs when regulated.
History and Legacy
Originating in 1972 as ETA 2824 (updated to -2 in 1982 with 25 jewels from 17), it evolved from Eterna designs post-Swatch Group integrations. Post-patent expiration, clones like Sellita SW200 emerged, but ETA’s original remains prized for serviceability—recommended every 5 years—and parts availability.
Pros and Usage
Reliable “workhorse” for daily wear, easy to service by watchmakers.
Found in brands like Certina, Oris, Tudor; customizable rotors.
Its modular design (automatic module on ETA 2801 base) ensures longevity, making it ideal for enthusiasts and professionals seeking precision without complexity.
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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