Combination lock
You didn’t ask, but the combination is 17-53-31.
Isn’t this the combination to every Dudley lock? Sure feels like. The first number is usually somewhere on the right side of the face, the second somewhere on the left side, and the last one fairly centred.
Eventually those numbers dissolve into the folds of your brain. All you retain is the sensation of the turning knob against the sides of your thumb, the smoothness of its spin and the feeling of those slighty embossed numbers beneath your fingerprint. If you’ve ever stepped up to the wrong locker and started twisting someone else’s lock, you’ll know what I mean. It feels weird.
One year I had one of those locks where the whole face of numbers spins instead. I’m sure my grades went down because of it.