A look inside a dial based resistance substitution box.

I've had this resistance substitution box for a very long time. I can't even remember where I got it from, but it might have been Tandy/Radio shack. Basically speaking it's a rotary dial that lets you select a resistance from 36 standard values by rotating a dial. It's INCREDIBLY useful for prototyping.
In this video I was opening it up to see if I had managed to smoke any of the resistors, since it sometimes gets a rough ride.