Product Details

This item is a vintage Gruen Autowind "Jump Hour" (or direct-read) mechanical digital wristwatch, dating roughly to the early 1970s Specifications & Design Mechanism: It features a mechanical "digital" movement (typically a Caliber 156D or 128D). Instead of traditional sweeping hands, the time is read directly via rotating internal discs. Complication: The hour disc "jumps" forward sharply at the top of each hour, while the minute and second discs rotate continuously. Case Style: Encased in a retro, gold-toned tonneau/futuristic TV-shaped case which was a hallmark look of transitional pre-quartz eras. Running at time of post. Unknown service history, ask all questions before bidding, sold as is no refunds or returns.