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This is a genuine ETA winding stem (Part No. 401) for the 2824/2834/2836 movements, made in Switzerland. It connects the crown to the keyless works for manual winding and time/date setting functions. Featuring 0.90mm thread specification, it is compatible with 2824, 2834, 2836, 2801, 2846 and other ETA automatic calibers.
Part Number：401
Compatible Movements：ETA 2801, 2804, 2824, 2826, 2834, 2836, 2846
Origin：Swiss Made
Thread Spec：0.90mm
1. Is this winding stem an original ETA genuine part?
Yes.
2. Which movements is this stem compatible with?
It fits ETA 2801, 2804, 2824, 2826, 2834, 2836, 2846 automatic calibers. While the stem is common across variants, verify your caliber before installation.
3. Does the stem need to be cut during installation?
The stem is supplied at a general length and must be cut to fit the specific case length before attaching the crown. This should be performed by a qualified watchmaker.
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