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…
GUCCI JUMP HOUR WATCH in Stainless Steel 38 mm Ref. 157.3 | eBay
SOLD c1973 Time Recorder Jump Hour mechanical watch - Birth Year Watches
Seiko Jump Hour Watch | islamiyyat.com
Seiko Tomony 5018-7000 "Jump Hour" | Wrislabs Store
Seiko Tomony 5018-7000 "Jump Hour" | Wrislabs Store
Jump Hour – My Retro Watches
Where to search for a jump hour movement? | WatchUSeek Watch Forums
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…”