The Eterna Calibre 1543 stands as a pinnacle of 1970s Swiss horological innovation, renowned among vintage enthusiasts for powering the rare Eterna-Matic Anatomic Seven-Day. This automatic manufacture movement exemplifies Eterna’s legacy of rotor efficiency and ergonomic design, appealing to hobbyist watchmakers seeking robust, serviceable calibers from the golden era of self-winding mechanics.
Historical Context
Introduced around 1970, the 1543 emerged during Eterna’s push for extended power reserves and anatomical case integration. It powered distinctive “Seven-Day” models with curved cases that hugged the wrist, blending form and function. Collectors prize its quick-date setting and manufacture pedigree, free from ETA dependency, marking Eterna’s independence in an era of consolidation.
Technical Specifications
Calibre: 1543 K (quick date setting)
Type: Automatic, self-winding
Beat Rate: 21,600 bph (6 beats per second)
Jewels: Approximately 25-30 (exact varies by variant)
Power Reserve: Up to 7 days in optimized configurations
Functions: Hours, minutes, center seconds, date
Rotor: Bi-directional, low-friction with Eterna’s signature ball-bearing design influences
Dimensions: 11.5-13 lignes (approx. 25-29mm diameter), slim profile ~5.9mm
Balance: Glucydur screwed balance with Nivarox hairspring
Shock Protection: Eterna-U or Incabloc equivalent
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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