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This is a genuine ETA 2000-401 winding stem for the 2000 series movements, Swiss made, compatible with 2000, 2000-1 and other slim automatic calibers. It connects the crown to the keyless works for manual winding and time setting functions. Featuring Tap 10 (0.90mm) specification and 17.70mm length, it is also compatible with Omega 725 and Omega 2520. This product is brand new and original, typically requiring cutting to case length during installation.
Part Number：2000-401
Compatible Movements：ETA 2000, 2000-1 (also Omega 725, 2520)
Origin：Swiss Made
Thread Spec：Tap 10（0.90mm）
1. Is this winding stem an original ETA genuine part?
Yes.
2. Which movements is this stem compatible with?
It fits ETA 2000, 2000-1 slim automatic calibers, and is also compatible with Omega 725 and 2520. The 2000-401 stem is not interchangeable with standard 401 stems—verify your movement caliber.
3. Does the stem need to be cut during installation?
The stem is supplied at a general length (17.70mm) and must be cut to fit the specific case length. This should be performed by a qualified watchmaker. Avoid pressing the stem release too firmly—excessive pressure may dislodge keyless works parts.
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