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This is a genuine MIYOTA winding stem (Part No. 065-403) for the 5Y20/5Y30 movements, made in Japan, compatible with 5Y20, 5Y30, 5Y26, 5Y36, 5920, 5930 series calibers. It serves as the critical mechanical component connecting the crown to the keyless works for time setting. Featuring Tap 12 (0.70mm) specification and 17.7mm length. This product is brand new and original, typically requiring cutting to case length during installation.
Part Number：065-403
Compatible Movements：5Y20, 5Y26, 5Y30, 5Y36, 5920, 5930
Origin：Made in Japan
Quality：Genuine original, brand new
Thread Spec：Tap 12（0.70mm）
1. Is this winding stem an original MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. Which movements is this stem compatible with?
It fits MIYOTA 5Y20 (2-hand), 5Y26 (high hand 2-hand), 5Y30 (3-hand), 5Y36 (high hand 3-hand) and 5920, 5930 series quartz calibers. Both 5Y20 and 5Y30 measure 5½×6¾ ligne (approx. 13.0×15.75mm) with 2.54mm height.
3. Is the stem compatible with both 5Y20 and 5Y30?
Yes. Technical references confirm both 5Y20 (2-hand) and 5Y30 (3-hand) use the same stem part number 065-403. The stem features Tap 12 (0.70mm) specification and 17.7mm length.
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