The ETA 2540 is a compact manual-wind movement from the Swiss manufacturer ETA, renowned for its reliability in vintage ladies’ watches. Produced from 1965 to 1972, it served as the base model for the 2540 series, emphasizing precision in slim cases.
Key Specifications
Size: 7¾ lignes (approximately 17.2 mm diameter), ideal for women’s timepieces.
Jewels: 17, reducing friction in critical components.
Beat Rate: 21,600 vibrations per hour (vph), with a 44-hour power reserve.
Features: Sweep seconds hand driven directly from the center, Incabloc shock protection, and movable balance stud for fine regulation.
Design and Functionality
Engineers designed the ETA 2540 with a Swiss lever escapement and stem-winding/setting mechanism, ensuring smooth operation in small formats. Its direct-driven center seconds provide fluid motion without a sub-second complication, enhancing readability in dress watches. The movement’s simplicity made it a staple for brands like Golana, with new old stock (NOS) units still available today.
Historical Context
ETA introduced the 2540 amid the rise of compact mechanical calibers, predating quartz dominance. It powered elegant vintage pieces, prized by collectors for serviceability and parts availability. Though discontinued, its legacy endures in horology, with variants like automatic upgrades in later series.
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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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