Eterna 1034: A Vintage Bumper Jewel for Enthusiasts
The Eterna Caliber 1034 stands as a charming relic from the golden age of Swiss watchmaking, introduced around 1941 as part of Eterna’s innovative automatic movement family. Tailored for ladies’ wristwatches, this bumper automatic captivated hobbyists with its compact reliability and smooth operation, often found in stainless steel cases from the mid-20th century. For vintage collectors and watchmakers, restoring a 1034 offers hands-on joy, blending historical charm with straightforward servicing.
Historical Context
Debuted post-WWII amid Eterna’s push for self-winding tech, evolving from manual-wind siblings like the 1031.
Featured in elegant ladies’ models, prized for slim profile suiting smaller wrists.
Bumper system— a patented Eterna hallmark—uses a gentle hammer-like mechanism for full-wind efficiency without over-winding.
Technical Specifications
Size: 9.75 lignes (22.2 mm diameter), ideal for compact cases.
Jewels: 17, reducing friction in key pivots for longevity.
Function: Self-winding automatic with bumper wind indicator; manual wind option via stem.
Hands: Fits 0.70 x 1.20 mm cannon pinion for delicate feminine dials.
Balance Staff: Eterna 25707 (replacements: 23203), prone to wear from daily shocks—common service point.
Stem: Type 4905, two-piece design for easy disassembly.
Power Reserve: Approximately 40-45 hours when fully wound.
Frequency: 18,000 vph (5 Hz), balancing smoothness and durability.
Thickness: Around 4.5 mm, enabling thin profiles under 9 mm total case height.
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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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