The Eterna Calibre 1457 is a classic Swiss automatic movement from the late 1960s–1970s, beloved by vintage watch collectors and watchmakers for its clean architecture and link to the famous ETA 2892 family. It powers many Eterna Matic 3000 and Sevenday models, offering a robust day‑date complication in an elegant, mid‑century design.
Why Enthusiasts Love It
It’s part of the Eterna 145x/146x family, a refined ultra‑thin automatic line that helped inspire the ETA 2892A2, making it a true ancestor of one of the most common high‑end calibres.
The movement is very service‑friendly: layout is logical, with a clear separation between the automatic works and the time train, simplifying cleaning and regulation.
Many examples feature a “U” or “K” suffix (e.g., 1457U), indicating Eterna‑U or Kif Ultraflex shock protection, which is a sign of better durability and collectible value.
The day‑date quick‑set function is straightforward and reliable, a hallmark of Eterna’s design focus on practicality in their Matic watches.
For Hobbyist Watchmakers
Taking apart a 145x/146x movement feels familiar to anyone who’s worked on ETA 2892s; the winding mechanism and gear train have a similar layout, though with some unique Eterna details.
The micro‑adjust regulator is nicely finished and allows precise poising and rate tuning, making it a strong candidate for a well‑regulated vintage service.
Good exploded diagrams and service literature exist, so sourcing spare parts (like date wheels, correctors, and automatic components) is usually feasible from specialist suppliers.
Technical Specifications
Type: Automatic, self‑winding, centre seconds with day‑date
Diameter: ~13 ligne (approx. 29.5–30 mm), depending on variant
Height: Main movement ~3.6 mm, day‑date version (Cal. 1457) ~4.15 mm
Jewels: 21 jewels minimum
Frequency: 18,000 vibrations per hour (2.5 Hz), 6 beats per second
Power Reserve: Around 44 hours
Functions: Hours, minutes, central seconds, day (window), and date (quick‑set)
Shock Protection: Eterna‑U or Kif Ultraflex (indicated by “U”/“K” suffix)
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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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