Eterna 12671: A Vintage Workhorse for Enthusiasts
The Eterna 12671 calibre, introduced around 1970, stands as a reliable automatic movement cherished by vintage watch collectors and hobbyist watchmakers for its robust ETA 2671 base and enduring performance in dress and everyday timepieces.
Historical Context
Emerged during Eterna’s push for dependable automatics, building on ETA’s proven architecture.
Featured in mid-sized watches, often with date complications, appealing to 1970s wearers seeking precision without ostentation.
Known for serviceability, making it a favorite for restoration projects among hobbyists.
Technical Specifications
Base calibre: ETA 2671 (Eterna-modified).
Type: Automatic with sweep seconds and quickset date.
Diameter: 17.2mm (7 3/4 lignes).
Height: Approximately 4.85mm.
Frequency: 18,000 or 21,600 vph (variants exist).
Jewels: 25.
Power reserve: Around 38-42 hours.
Functions: Hours, minutes, central sweep seconds, date at 3 o’clock.
Winding: Bidirectional rotor, self-winding via wrist motion.
Shock protection: Standard Incabloc or equivalent.
Hack feature: Yes, for precise time-setting.
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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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