Long before digital navigation, the Plus Four Wristlet Route Indicator offered motorists a stylish and innovative way to find their way. Introduced in Britain during the 1920s, this device resembled a wristwatch but housed a manually operated scroll-map inside. Drivers could wear it on their wrist and turn the knobs to display turn-by-turn directions, much like reading a strip of instructions on the go. The route indicator worked using interchangeable paper scrolls, each pre-printed with directions for specific journeys. Users would insert the correct scroll before setting off and rotate the knobs as they progressed along their route. Though primitive by today’s standards, it was a cutting-edge travel aid at a time when road signs were scarce and maps were bulky. It was especially popular among motorists wearing "plus fours" a type of knickerbocker pants fashionable at the time hence the name. While the Plus Four Wristlet never became a mass-market essential, it remains a fascinating glimpse into the early intersection of travel, fashion, and technology. Today, it’s a prized collector’s item and a reminder of the creativity sparked by the rapid rise of automobile travel in the early 20th century.