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This is a genuine ETA 280.002 movement winding stem (Part No. 401-1155) , Swiss made, designed for the 3¾ x 6¾ ligne (approx. 9.00 × 15.15mm) ultra-thin two-hand quartz caliber. It connects the crown to the keyless works for time setting function. Featuring Tap 11 (0.80mm) specification. This product is brand new and original, typically requiring cutting to case length during installation.
Part Number：401-1155
Compatible Movements：ETA 280.002, 280.001
Origin：Swiss Made
Thread Spec：Tap 11 (0.80mm)
1. Is this winding stem an original ETA genuine part?
Yes.
2. Which movements is this stem compatible with?
It fits ETA 280.002 and 280.001 quartz calibers. The 280.002 is a 3¾×6¾ ligne ultra-thin movement with 1.80mm height, featuring 5 jewels.
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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