|Winding:||Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding|
|Diameter:||25.60 mm (11.5 ligne)|
|Complications:||Date, Hacking Seconds, Power Reserve Indicator, Quick Date Correction, Semi-Instantaneous Date Change|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00, Power Reserve Pointer at 7:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 2004 – Current|
ETA’s 2897 is a modular movement with power reserve indicator and date. It is derived from the similar ETA 2892A2 and is part of the third-generation ETA 2890 family. Cal. 2897 appeared in 2004, alongside ETA 2896, and remains in production today.
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.
Most members of the modern 2890 family are available in there finish levels:
- Elaboré – with nickel balance
- Top – with Glucydur balance
- Chronomètre – with Glucydur balance and official chronometer certification
ETA also sells these movements with gold plating, various finishes, and custom rotors.
ETA 2890 Family
|No Date||ETA 2890 (12.5”’)|
|Date||ETA 2892 (12.5”’)||ETA 2892-2||ETA 2892A2|
|World Time Disc, Date||ETA 2893-1|
|Adjustable 24 Hour Hand, Date||ETA 2893-2|
|World Time Disc, No Date||ETA 2893-3|
|Modular Chronograph, Small Seconds, Date||ETA 2894-2 (12.5”’)|
ETA 2894S2 (12.5”’)
|Small Seconds, Date||ETA 2895-1||ETA 2895-2|
|Dual Concentric Wheel Date||ETA 2896|
|Power Reserve Indicator, Date||ETA 2897|
|Perpetual Calendar, Moon Phase, No Seconds||ETA 2890-9||ETA 2890A9|
|Perpetual Calendar, Moon Phase, Central Seconds||ETA 2891-9||ETA 2891A9|