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This is a genuine ETA F03.111 movement winding stem, Swiss made, designed for the 7¾ ligne (17.2mm) 3-hand with date quartz caliber. It connects the crown to the keyless works for time setting and stem position control. Featuring Tap 10 (0.90mm) specification, with variant 401-1520 available for 2-hand versions. This product is brand new and original, typically requiring cutting to case length during installation.
Part Number：401（generic）/ 401-1520（2-hand version）
Compatible Movements：ETA F03.111, F04.111, F05.111, F06.111, F07.111
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 F03.111, F04.111, F05.111, F06.111, F07.111 series calibers. These movements belong to ETA’s Trendline family and share the same stem part number. The F03.111 is a 3-hand with date movement, while a 2-hand version uses a different stem (401-1520).
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. For stem removal, the stem should be in position 0 (pressed in) before pressing the release lever near the stem hole. Work should be performed by a qualified watchmaker.
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