Gruen Doctor's jump hour watch

This is a much rarer Gruen doctor's watch jump hour. The jump hour can be seen as early attempt for the watch company to create a "digital" watch. I was offered a Rolex Prince jump hour in 1988 but I was unable to afford as I was still in university studying. After more then 22 years, I have finally found a jump hour ( even though it's only a Gruen) with original dial ...
























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