The ETA 2804-1 is a reliable manual-wind mechanical movement from ETA SA, a Swatch Group subsidiary renowned for precision Swiss calibers. Produced as part of the Mecaline series, it powers numerous vintage and entry-level watches with its compact design and consistent performance.
Key Specifications
Diameter: 25.6 mm (11.5 lignes), fitting standard 38-42 mm cases.
Height: 3.35 mm, ideal for slim profiles.
Jewels: 17, reducing friction in critical pivots.
Frequency: 28,800 vph (4 Hz), enabling smooth seconds sweep.
Power Reserve: 42 hours when fully wound.
Design and Features
This three-hand movement (hours, minutes, sweep seconds) lacks date or automatic winding, emphasizing simplicity and serviceability. It uses Glucydur balance and Breguet hairspring for shock resistance via Incabloc system. Direct seconds at 9 o’clock enhances balance wheel visibility, appealing to enthusiasts.
History and Usage
Introduced in the 1970s, the 2804-1 evolved from ETA’s workhorse lineup, similar to the automatic 2824-2 but manual. Brands like Tissot, Omega (early models), and independents adopted it for dress watches. Production phased out post-2000s amid Swatch’s Powermatic shift, but spares remain abundant.
Advantages for Collectors
Affordable servicing (parts widely available).
High beat rate for accuracy (±12 sec/day).
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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