The ETA 2685 is a reliable automatic watch movement from the Swiss manufacturer ETA SA, known for powering mid-range timepieces with added complications.
Overview
Introduced in the late 20th century, the ETA 2685 builds on ETA’s robust base calibers, incorporating a moonphase module for celestial tracking alongside standard timekeeping. This self-winding movement features a sweep seconds hand, quickset date, and quickset moonphase display, appealing to enthusiasts seeking poetic functionality without excessive complexity. It typically offers around 38-42 hours of power reserve, depending on configuration, and supports optional hacking for precise time-setting.
Key Specifications
Type: Automatic mechanical with moonphase complication
Jewels: 25 (often gold-plated in premium variants)
Functions: Hours, minutes, central sweeping seconds, date at 3 o’clock, moonphase at 6 o’clock
Frequency: 28,800 vibrations per hour (4 Hz) for smooth operation
Diameter: Approximately 25.6 mm (11.5 lignes)
Height: Around 5.25 mm, suitable for thinner cases
Usage in Watches
Brands like Oris modified it into calibers such as the Oris 586 for moonphase models in the 2000s, showcasing its versatility in pilot and dress watches. Omega and others used similar ETA bases historically, though the 2685 appears in niche or custom builds. Today, it’s available as a spare part for restorations,
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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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