Price range: $360.00 through $415.00
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The ETA 2892-A2 is a premium Swiss‑made automatic mechanical movement renowned for its slim profile (only 3.60mm thick) and high‑grade architecture, widely used in refined and high‑end mechanical watches requiring precision and compact integration. Featuring a 4Hz beat rate (28,800 vibrations per hour) and a 21‑jewel construction, it delivers stable timekeeping and long‑term durability. As one of ETA‘s most iconic calibers, the 2892-A2 is a preferred choice for professional watchmakers and luxury timepiece servicing.
Ultra‑thin design: Only 3.60mm thick – one of the thinnest automatic movements on the market, ideal for slim cases.
High frequency: 28,800 vph (4Hz) – smooth seconds hand sweep and high precision (often COSC‑capable).
21 jewels: Critical bearings use rubies to reduce friction and extend movement life.
Bidirectional automatic winding: Ball‑bearing rotor for efficient winding and comfortable wear.
Hacking (stop‑seconds): Pulling the crown to the time‑setting position stops the seconds hand for precise synchronisation.
Modular expandability: Can be fitted with date, day, power reserve, GMT modules, giving rise to calibers 2893, 2895, etc.
Widely used: Longines, IWC, Omega, Cartier and many other high‑end brands.
ETA original quality: Swiss made, stable timekeeping, easy to service.
⚠️ Stem specification: Use stem ref. ETA 410‑1016 (Tap 10 thread, 0.90mm diameter).
⚠️ Dial feet position: The dial feet pattern for the 2892‑A2 differs from the 2824; dials are not interchangeable.
⚠️ Date danger zone: Never adjust the date between 21:00 and 03:00 – this can damage the date driver.
⚠️ Anti‑magnetic: The movement is not specially shielded; avoid strong magnetic fields.
⚠️ Accuracy grades: Different grades (Standard, Elaboré, Top, Chronometer) have different tolerances – Top/Chronometer achieve -4/+6 sec/day.
⚠️ Service interval: Full service (cleaning, lubrication) is recommended every 5‑8 years.
Q1: Can the 2892‑A2 directly replace the older 2892?
A: Yes. The 2892‑A2 is an upgraded version with improved automatic winding and regulation systems, but dimensions and mounting are identical – a direct drop‑in replacement.
Q2: What lift angle should be set on a timing machine?
A: Set the lift angle to 50° when testing this movement.
Q3: Does the 2892‑A2 have a hacking (stop‑seconds) function?
A: Yes. Pull the crown to the second position and the seconds hand stops for precise synchronisation.
Q4: What accuracy can be expected?
A: Grade‑dependent: Standard (±12‑30 sec/day), Elaboré (±6‑20 sec/day), Top (±4‑15 sec/day), Chronometer (-4/+6 sec/day, COSC‑certified).
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