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Seiko

Crown-side photo of VWS Seiko 5 7S26-3170 from 1997

Why Some Vintage Seiko Watches Cannot Be Hand-Wound or Hacked

Crown-side photo of VWS Seiko 5 7S26-3170 from 1997
automatic movement

Why Some Vintage Seiko Watches Cannot Be Hand-Wound or Hacked

A caliber-aware guide to why some Seiko automatic movements lack crown hand-winding or hacking, with real catalog examples and safe setting advice.

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