|Winding:||Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding|
|Diameter:||28.00 mm (12.5 ligne)|
|Complications:||2-Button, 6-Column Chronograph, Chronograph, Column Wheel Chronograph, Date, Hacking Seconds, Modular, Modular Chronograph, Quick Date Correction, Semi-Instantaneous Date Change|
|Hands:||12 Hour Chronograph Hand at 6:00, 30 Minute Chronograph Hand at 9:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Date Window at 4:30, Small Seconds Hand at 3:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 1996 –|
Cal. 2894-2 is a modular chronograph built on the ETA 2892-2 base. Because it features a “balanced” 3-6-9 subdial arrangement and is built on a reliable and slim base, it is popular with higher-end watch manufacturers.
ETA 2894-2 Functions
Cal. 2894-2 features a “balanced” subdial arrangement but these features are arranged in an unusual order:
- Small running seconds at 3:00
- A date window at 4:30 (though this can be relocated)
- 12 hour chronograph counter at 6:00
- 30 minute chronograph counter at 9:00
Very few watch movements in history have a small seconds subdial at 3:00.
ETA 2894-2 Operation
The chronograph function is started, stopped, and restarted using the button at 2:00. It is reset to zero using the button at 4:00.
The movement can be manually wound with the crown in position 1. Rotate the crown clockwise to wind the mainspring.
The date wheel is advanced with the crown in second position (one notch out). Turn the crown counter-clockwise to advance the date wheel by one day.
The time is set with the crown in third position (pulled all the way out). Rotate the crown clockwise to advance the minute and hour hands and counter-clockwise to turn them backward.
ETA 2894-2 Ebauches
This is also used by TAG Heuer as their Calibre 17.
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.