A GPS device from the 1920s
What did people do before the days of GPS satellites and battery-sucking A-GPS phones? Not only was there a navigational device that gave driving directions in the early 20th century, it was small enough to fit on your wrist.
This product from the 1920s is a scroll-map navigator in the shape of a watch. It came with tiny interchangeable instructions that you scrolled manually to see which roads to take when driving.
Named the Plus Four Wristlet Route Indicator, this relic from the past was a British product that would have cost about 5 pounds at the time, about 50 … Read more