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This is a genuine Ronda winding stem for the 6203.B and 6004 series movements, Swiss made, compatible with 6203.B, 6004.B, 6004.D and other multi-function quartz calibers. It serves to connect the crown to the keyless works for time setting and date quickset functions. Featuring Tap 10 (0.90mm) specification. This product is brand new and original, and typically requires cutting to case length during installation.
Compatible Movements：Ronda 6203.B, 6004.B, 6004.D
Origin：Swiss Made
Thread Spec：Tap 10 (0.90mm)
1. Is this winding stem an original Ronda genuine part?
Yes. It is an original Ronda factory part for 6203.B and 6004 series calibers.
2. Which movements is this stem compatible with?
It fits Ronda 6203.B, 6004.B, 6004.D calibers. The 6203.B is a dual time movement with big date at 12H and second time zone at 6H; the 6004 series features big date at 12H and small seconds at 6H.
3. What is the difference between 6203.B and the 6004 series?
The 6203.B is a dual time zone movement with an independently adjustable second time zone at 6H; the 6004 series is a big date movement with double-digit date at 12H and small seconds at 6H.
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