The Eterna Calibre 1420 stands as a gem for vintage watch enthusiasts and hobbyist watchmakers, embodying mid-20th-century Swiss precision in a compact ladies’ automatic movement. Produced around the 1960s, this tiny powerhouse—about one-third the size of standard men’s calibers—delivers self-winding reliability with elegant engineering, ideal for restoring delicate dress watches.
Historical Context
Introduced in the Eterna Matic line, the 1420 reflects Eterna’s post-war innovation in slim automatics for women.
Often found in vintage Eterna ladies’ models from the 1960s-1970s, it showcases the brand’s rotor-based winding system.
Variants like 1420U highlight its evolution, with shock protection and refined finishing for durability.
Technical Specifications
Size: 7 1/2 lignes (16.3-16.5 mm diameter); height approximately 4.9 mm.
Jewels: 17-21, including cap jewels for reduced friction.
Frequency: 21,600 beats per hour (A/h); power reserve around 39 hours.
Escapement: Pallet lever; automatic with central rotor and sliding mainspring in barrel.
Functions: Sweep seconds; some with date complications.
Shock system: Present in later versions for balance protection.
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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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