DCVW on Instagram: “This is a quite unique one - a Seiko jump hour! Beginning in 1979, Alba - a sub-brand of Seiko – has continued to produce wristwatches…”
1960's Seiko - mechanical wind jump hour. The inside movement is made by the Claro watch company (Chinese co.). During their early production years they outsour…
How do Jump hour watches work | WatchUSeek Watch Forums
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