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This is a genuine Ronda winding stem for the 3520.D movement, Swiss made. It serves as the critical mechanical component connecting the crown to the keyless works for time setting and date quickset functions. Featuring Tap 0.9mm specification and 19.2mm length. This product is brand new and original, and typically requires cutting to case length during installation.
Part Number：3000.205（Ronda official number）
Compatible Movements：Ronda 3520.D / 3540.D
Origin：Swiss Made
Thread Spec：Tap 0.9mm
Length：19.2mm
1. Is this winding stem an original Ronda genuine part?
Yes. Part No. 3000.205 is the official Ronda factory number for 3520.D and 3540.D calibers.
2. Which movements is this stem compatible with?
It fits Ronda 3520.D and 3540.D quartz calibers. The 3520.D is a Startech series chronograph movement with date at 3 o’clock.
3. Does the stem need to be cut during installation?
The stem has a length of 19.2mm 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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