The ETA 2521 is a vintage automatic mechanical watch movement produced by ETA SA, renowned for its reliability during the late 1960s and early 1970s.
Overview
Introduced around 1965-1970, the ETA 2521 served as an adaptation of Otero family calibers to meet surging demand for affordable automatics, often rebranded under Dugena names. This 13 ligne (29mm diameter) movement features a sweep seconds hand and date complication, with an excenter winding system for smooth self-winding. It powered various mid-range watches, emphasizing ETA’s role in democratizing mechanical horology.
Key Specifications
Dimensions: 29.00mm diameter, 4.50mm height.
Jewels: 17/25 configuration.
Frequency: 18,000 A/h (2.5 Hz).
Power Reserve: Approximately 42 hours.
Functions: Automatic winding, central seconds, date window (set via crown at 20:30-24:00).
Historical Context
The 2521 emerged amid the quartz crisis prelude, bridging manual and automatic eras with robust construction. It shares traits with ETA’s 2500 family, using Incabloc shock protection for durability. Collectors prize it for serviceability, with parts still available from specialists.
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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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