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This is a genuine Ronda winding stem (Part No. 401-1585/982004011019/3000.170) for the 1019 movement, Swiss made, compatible with 1019, 1015, 1016 and other 11½ ligne Slimtech ultra-slim calibers . Featuring Tap 10 (0.90mm) specification and 20mm length, it connects the crown to the movement for time setting and date quickset functions . This product is brand new and original, requiring cutting to case length during installation.
Part Number：401-1585（Ronda）/ 982004011019（Boley）/ 3000.170（generic）
Compatible Movements：Ronda 1019, 1015, 1016（and 1002-1009, 1012-1019 series）
Origin：Swiss Made
Thread Diameter：0.90mm（Tap 10）
1. Is this winding stem an original Ronda genuine part?
Yes.
2. Which movements is this stem compatible with?
It fits Ronda 1019, 1015, 1016, and covers the full 1002-1009 and 1012-1019 series . The 1019 is an 11½ ligne Slimtech movement with hours/minutes, small seconds at 6H, and date at 3H .
3. Does the stem need to be cut during installation?
The stem has a total length of 20mm 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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