Eterna Caliber 1198: A Vintage Automatic Pioneer
The Eterna Caliber 1198 stands as a landmark in horology, debuting in 1948 as the smallest self-winding movement of its era. Crafted for vintage enthusiasts and hobbyist watchmakers, this compact powerhouse powered early Eterna-Matic watches, blending innovation with reliable craftsmanship that still captivates collectors today.
Historical Context
Introduced amid post-war innovation, the 1198 marked Eterna’s breakthrough in micro-rotor technology. Unlike bulkier bumper automatics, its tiny oscillating mass enabled slimmer cases without sacrificing performance. Vintage models from the 1950s showcase its role in elegant dress watches, prized for smooth sweeping seconds and enduring serviceability.
Technical Specifications
Diameter: 9.25 lignes (20.50 mm)
Height: 5.35 mm
Jewels: 18–22 (depending on variant)
Frequency: 18,000 vph (2.5 Hz)
Power Reserve: Approximately 38–40 hours
Winding: Bidirectional micro-rotor (ball-bearing mounted)
Functions: Time-only with central seconds; some with date
Regulation: Free-sprung balance, adjustable via weights
Finish: Geneva stripes on bridges, blued screws
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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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