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.This is a genuine Hattori winding stem (Part No. 351-178) for the VX50 movement, made in Japan, designed for the VX50 two-hand quartz caliber. It serves as the critical mechanical component connecting the crown to the keyless works for time setting functions. Featuring Tap 9 (0.90mm) specification and 20.7mm length. This product is brand new and original, and typically requires cutting to case length during installation.
Part Number：351-178
Compatible Movements：VX50 two-hand quartz caliber (also compatible with VX51, VD54, VD55, VD56 series)
Origin：Made in Japan
Quality：Genuine original, brand new
Thread Spec：Tap 9 (0.90mm)
Length：20.7mm
Movement Size：6¾ × 8 ligne (15.30 × 18.20mm)
Movement Height：2.16mm
1. Is this winding stem an original Hattori genuine part?
Yes. It is an original Hattori/Seiko factory part, made in Japan.
2. Which movements is this stem compatible with?
It fits the Hattori VX50 two-hand quartz caliber (6¾×8 ligne, 15.30×18.20mm), also compatible with VX51, VD54, VD55, VD56 series. The VX50 is a two-hand, no-date movement with one crown position for time setting.
3. Does the stem need to be cut during installation?
The stem has a length of 20.7mm and must be cut to fit the specific case length during installation before attaching the crown. This should be performed by a qualified watchmaker.
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