Eterna Caliber 675: A Timeless Gem for Vintage Enthusiasts
The Eterna Caliber 675 stands as a pinnacle of early 20th-century Swiss horology, cherished by vintage watch collectors and hobbyist watchmakers for its compact elegance and robust manual-wind reliability. Produced primarily in the 1930s for ladies’ rectangular and tonneau-shaped watches, this movement exemplifies Eterna’s precision engineering during the Art Deco era, blending finesse with durability for everyday wear.
Historical Context
Introduced around the 1930s, the Caliber 675 powered elegant ladies’ timepieces from brands like Peertone and unsigned steel cases, often featuring snap-back designs. Its slim profile suited the era’s fashionable rectangular cases, typically 23mm wide. Collectors prize it for scarcity and originality, as many survive from full services, showcasing perlage finishes and clean bridges.
Technical Specifications
Type: Manual wind, rectangular or tonneau-shaped.
Jewels: 16 or 17, cap jewels on balance and pallet staff.
Dimensions: Approximately 23mm case diameter compatibility; slim height under 3mm.
Beat rate: 18,000 vph (5 Hz), with Glucydur balance and Nivarox hairspring.
Functions: Hours, minutes; sub-seconds at 6 o’clock.
Power reserve: Around 40-45 hours via Eterniflex mainspring.
Shock protection: Eterna-U system for resilience.
Finishes: Perlage on plates, blued screws, minimal markings for understated luxury.
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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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