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This is a genuine Hattori winding stem (Part No. 351.173) for VC00/VC10/VC11 movements, made in Japan. It serves as the critical mechanical component connecting the crown to the keyless works for time setting and manual winding functions. Featuring Tap 9 (0.90mm) specification and 15.4mm total length, it is compatible with VC00, VC01, VC10, and VC11 calibers. This product is brand new and original.
Part Number：351.173
Compatible Movements：VC00 / VC01 / VC10 / VC11 Hattori quartz calibers
Origin：Made in Japan
Quality：Genuine original, brand new
Thread Spec：Tap 9（0.90mm）
Total Length：15.4mm
1. Is this winding stem an original Hattori genuine part?
Yes. It is an original Hattori/Seiko factory part (Part No. 351.173), made in Japan.
2. Which movements is this stem compatible with?
It fits Hattori VC00, VC01, VC10, and VC11 quartz calibers. VC00 measures 4¾×6½ ligne; VC10/VC11 measure 5½×6¾ ligne. Note that the Tap 9 version (351.173) is not interchangeable with Tap 10 or Tap 13 versions.
3. What should be noted during stem installation?
Stem installation involves movement disassembly and crown attachment, requiring professional tools. Work should be performed by a qualified watchmaker.
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