The Eterna Caliber 1544 stands as a pinnacle of mid-20th-century Swiss horology, cherished by vintage watch enthusiasts and hobbyist watchmakers for its robust automatic design and innovative ball-bearing rotor system. Produced primarily in the 1960s, this movement powered many Eterna-Matic models, blending reliability with elegant engineering that hobbyists still restore today.
Historical Context
Introduced during Eterna’s golden era of self-winding innovations, the Caliber 1544 evolved from earlier rotor designs like the 1543. It featured Eterna’s proprietary ball-bearing technology, using tiny ruby or steel balls to minimize friction in the automatic winding system. Collectors prize serviced examples for their smooth sweep seconds and durability in daily wear vintage pieces.
Technical Specifications
Type: Automatic self-winding with bi-directional rotor on 5 ball bearings (0.65mm diameter each).
Functions: Hours, minutes, sweep seconds; day-date complication at 3 o’clock.
Jewels: 25 high-quality synthetic rubies for reduced wear.
Frequency: 18,000 vibrations per hour (2.5 Hz), with Glucydur balance and Nivarox hairspring.
Dimensions: 11.75 lignes (26.6mm diameter), 5.25mm height—ideal for slim dress watches.
Power Reserve: Approximately 40-45 hours on full wind.
Shock Protection: Eterna-U system for resilience against impacts.
Winding: Peripheral rotor gear, low-friction double-click mechanism for efficient energy transfer.
Finish: Perlage on bridges, signed Eterna plates with serial numbers dating production.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340