Eterna Caliber 1275: A Timeless Manual Marvel
The Eterna Caliber 1275 stands as a pinnacle of mid-20th-century Swiss manual-wind engineering, cherished by vintage watch enthusiasts and hobbyist watchmakers for its reliability and elegant finishing. Produced primarily in the 1950s, this 11.5 ligne movement powered numerous Eterna dress watches, embodying the brand’s commitment to precision during the post-war horological boom.
Historical Context
Introduced around 1950, the 1275 evolved from Eterna’s earlier manual movements like the 1274, reflecting a shift toward compact, high-beat designs amid rising demand for refined timepieces. It appeared in models with clean dials and stainless steel or gold cases, often featuring sub-seconds at 6 o’clock. Collectors prize it for its association with Eterna’s innovative era, just before the automatic revolution dominated.
Technical Specifications
Diameter: 11.5 lignes (26.60 mm)
Height: Approximately 4.8 mm
Jewels: 17
Beat rate: 18,000 vph (5 Hz)
Power reserve: ~42-45 hours
Lift angle: 52 degrees
Balance: Glucydur screwed balance with flat Nivarox hairspring
Shock protection: Eterna-U system
Functions: Hours, minutes, center seconds
Mainspring: High-efficiency Eterniflex barrel
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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