The ETA 2390 is a classic mechanical manual-wind movement known for its reliability and widespread use in vintage Swiss watches. Introduced in the mid-20th century, it remains a favorite among collectors and watchmakers for its robust design and straightforward mechanics.
Key Features
Movement Type: Mechanical, manual-wind
Diameter: 10.5”’ (23.2–23.7 mm)
Height: 3.6 mm
Jewels: 17
Frequency: 18,000 vibrations per hour (2.5 Hz)
Power Reserve: Approximately 47 hours
Lift Angle: 52°
Regulation: Features a screw balance and Swiss lever escapement; later versions include an annular (screw-less) balance
Seconds: Direct central sweeping seconds
Hairspring: Early models have a fixed stud-holder, while later ones feature a mobile stud-holder
Notable Details
The ETA 2390 is part of a family of movements, with the ETA 2391 being a slightly larger version (11.5”’).
The movement is shock protected, ensuring durability.
It is commonly found in watches from the 1950s and 1960s, and its simple architecture makes it a popular choice for restoration and repair projects.
Bullet Points
Manual-wind, mechanical movement
10.5”’ diameter, 3.6 mm height
17 jewels, 18,000 vph frequency
47-hour power reserve
Screw balance, Swiss lever escapement
Central sweeping seconds
Fixed or mobile hairspring stud-holder (depending on production date)
Widely used in vintage Swiss watches
The ETA 2390 is a testament to ETA’s engineering legacy, combining practicality and reliability in a compact movement that continues to be valued by horology enthusiasts today.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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