This Smiths speedometer/odometer is one of the earliest examples of an automotive gauge that includes a speedometer, odometer and a trip meter as well.
JD Laukkonen turned wrenches in the north end of Seattle for a decade, so he's no stranger to the inner workings of modern automobiles. He has worked as a freelance writer since closing his shop in 2007, and he currently covers automotive technology for Lifewire.com.