|Winding:||Automatic, Bi-Directional Automatic Winding|
|Diameter:||25.6 mm (11.5 ligne)|
|Complications:||Date, Hacking Seconds, Hand Winding, Quick Date Correction|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00|
|Production: 1983 – 2000|
ETA’s 2892-2 was an ultra-thin automatic watch movement and part of the second generation of the ETA 2890 family. It was introduced in 1983 as an update to the outgoing ETA 2892, and remained in production until 2000. The current ETA 2892A2 is the successor movement.
The short-lived Eterna 1504 and ETA 2892 used a large winding mass to power the strong mainspring needed to operate at 28,800 A/h. But when the diameter of the plate was reduced from 12.5”’ to 11.5”’ (25.6 mm) for this ETA 2892-2, issues arose. The winding mass, combined with inefficiencies in the automatic winding works, caused the ETA 2892-2 and related second-generation movements to disappoint users by not being fully wound throughout the day. This was remedied in the successor ETA 2892A2.
The ETA 2892-2 features a date complication like the predecessor ETA 2892. Since it was easy to omit this display, and the advanced date works did not affect the 3.6 mm height of the movement, no successor to the non-date ETA 2890 was created. This movement was used as the basis for a number of modular variants:
- ETA 2890-9 (1990-2000): Perpetual calendar with moon phase
- ETA 2891-9 (1990-2000): Perpetual calendar with moon phase and central seconds
- ETA 2894-2 (1996-present): Chronograph with date and small seconds
- ETA 2894S2: Skeletonized chronograph with small seconds
- ETA 2895-1 (1997-2000): Sate and small seconds
Many manufacturers customized the ETA 2892-2 ebauche. Notable variants on this movement include the IWC 3575, 35780, 35782, 35790, and 37521. Clones of this movement include the Sellita SW300.