The Eterna 1077 stands as a pinnacle of mid-20th-century Swiss horology, captivating vintage watch enthusiasts and hobbyist watchmakers with its robust engineering and timeless reliability. Introduced around the early 1970s, this automatic calibre evolved from Eterna’s esteemed base movements like the 905, blending bumper winding innovation with practical complications for everyday wear.
Historical Context
Debuted post-1971, marking Eterna’s shift toward accessible automatics amid the quartz crisis prelude.
Featured in durable dress and sports watches, prized today for serviceability and parts availability.
Exemplifies Eterna’s legacy of low-friction designs, echoing their pioneering ball-bearing rotors from the 1940s Eterna-matic series.
Technical Specifications
Type: Automatic with bumper winding system.
Size: 9.75 lignes (approximately 21.6 mm diameter); height around 5-6 mm.
Jewels: 25-27, including barrel bearings for reduced wear.
Functions: Sweep seconds from center, quickset date, 12/24-hour display, hacking seconds.
Frequency: 18,000 vph (5 Hz), with Glucydur balance and Nivarox hairspring.
Power Reserve: Approximately 40-45 hours on full wind.
Shock Protection: Eterna-U system for resilience in daily use.
Rotor: Bi-directional, low-friction mounting derived from earlier Eterna innovations.
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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