Simon Jansen, he of Star Wars ASCIImation, the TARDIS MAME console, Beer Brewing Bender fame, was recently inspired by the 1920s “Plus Four Wristlet Route Indicator” that he’d sent us the link to some weeks back. He decided to try and build one.

I made my own version, using some brass bits and pieces, a scrap of leather, a glass microscope slide, and a list of directions printed out from Google Maps. Amazingly, it actually works!

Brass wristlet Google maps navigator watch