The Eterna 1076 stands as a pioneering bumper automatic calibre from the mid-1940s, captivating vintage watch enthusiasts and hobbyist watchmakers with its innovative self-winding mechanism.
Historical Context
Introduced around 1944, the Eterna 1076 marked an early milestone in automatic watch movements. Derived from base designs like the 905, it featured a distinctive bumper system where a spring-loaded hammer struck the rotor at full wind, preventing overwinding. This robust engineering reflected Eterna’s post-WWII push for reliable, low-maintenance timepieces.
Technical Specifications
Size: 13 lignes (approximately 29mm diameter), 5.9mm height
Winding: Bumper automatic with bi-directional rotor on ball bearings
Functions: Centre seconds, date at 3 o’clock
Beat rate: 18,000 vibrations per hour (vph)
Balance: Glucydur screwed balance with flat Nivarox hairspring
Shock protection: Eterna-U system
Jewels: 17-19 jewels
Power reserve: Approximately 40 hours when fully wound
Frequency: 2.5 Hz
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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