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This is a genuine Ronda winding stem for 785 movements, Swiss made, compatible with Ronda 785 and 705, 715, 775 series calibers. It serves as the critical mechanical component connecting the crown to the keyless works for time setting and manual winding functions. Featuring Tap 0.9mm specification and 17mm length. This product is brand new and original, and typically requires cutting to case length during installation.
Part Number：3000.131 / 401-1233
Compatible Movements：Ronda 785, 705, 715, 775（and 70x, 77x, 78x series）
Origin：Swiss Made
Quality：Genuine original, brand new
Thread Spec：Tap 0.9mm
Length：17mm
1. Is this winding stem an original Ronda genuine part?
Yes. It is an original Ronda factory part from Switzerland.
2. Which movements is this stem compatible with?
It fits Ronda 785, 705, 715, 775 and 70x, 77x, 78x series calibers. The Ronda 785 is an 8¾ ligne (approx. 19.40mm) quartz movement.
3. Does the stem need to be cut during installation?
The stem has a length of 17mm 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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