|Reserve:||42, 50 hours|
|Winding:||Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding|
|Diameter:||25.60 mm (11.5 ligne)|
|Complications:||Date, Hacking Seconds, Quick Date Correction, Semi-Instantaneous Date Change|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 1999 – Current|
Also called 2892-A2 and 2892/A2, Cal. 2892A2 is derived from the similar ETA 2892-2. This third generation of the ETA 2890 family appeared in 1999 and remains in production today. The modification was focused on winding efficiency, with a reduced chamfer increasing the mass of the winding rotor and the switch from a stud to a jewel in the upper winding bridge for the intermediate wheel.
Cal. 2892A2 first appeared in 1999 and is the basis for a number of other ETA movements, including the following:
- ETA 2892A2 (1999-present) – 3.6 mm height, quickset date
- ETA 2890A9 (1999-2005) – 5.2 mm height, perpetual calendar with moon phase
- ETA 2891A9 (1999-2005) – 5.2 mm height, perpetual calendar with moon phase and sweep seconds
- ETA 2893-1 (2002-present) – 4.1 mm height, world time disc, quickset date, and sweep seconds
- ETA 2893-2 (2002-present) – 4.1 mm height, dual time zone hand, quickset date, and sweep seconds
- ETA 2893-3 (2002-present) – 4.1 mm height, world time disc and sweep seconds
- ETA 2895-2 (1999-present) – 4.35 mm height, quickset date and sub seconds
- ETA 2896 (2003-present) – 4.85 mm height, quickset big date and sweep seconds
- ETA 2897 (2004-present) – 4.85 mm height, power reserve indicator at 7:00, quickset date, and sweep seconds
ETA 2892A2 Ebauches and Clones
Cal. 2892A2 is available in Elaborate, Top, and Chronometer grade, each with better accuracy and build materials.
Cal. 2892A2 is also known as Maurice Lacroix ML-129, TAG Heuer Calibre 7, and TAG Heuer Calibre 8 RS. It is the basis for Ball RR1101, Ball RR1201, Ball RR1801, Omega 1120, Omega 2500, IWC 30110, 30120, and 37524, and TAG Heuer Calibre 11.
ETA 2890 Family Overview
The ETA 2890 family is a series of slim and robust automatic watch movements produced by ETA since 1975. They are generally regarded as superior to the similar ETA 2800 family. Cal. 2890 and its successors is based on an Eterna design, with ball bearings on the rotor and a smaller balance wheel in the modern style. The family remains one of the leading watch movements to this day.
The most well-known movement in this series today is Cal. 2892A2, a highly evolved automatic movement with central seconds and a date wheel. Because of its slim dimensions, Cal. 2892A2 is often paired with modules to add world time, power reserve indicator, chronograph, and other complications.
Distinguishing features of the ETA 2890 family include a smaller balance wheel than historic movements, including the ETA 2824 family, and a large rotor hub located with seven visible bearings. The balance is located at 12:00 when viewed from the back with the crown at 9:00, and is located by a clockwise cock with an eccentric screw for regulation.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.