1920s TomTom

The Wrist Mounted Original

The device was on display as part of the British Library's "Weird and Wonderful Inventions and Gadgets" exhibition several years ago. 
The Mail Online theorized that the device never saw mass uptake not because of its flaws, but because it was invented too early; that there were reportedly not enough motorists in the 1920s to support mass manufacture. 
LINK The Wrist Mounted Original