This morning we had a "presentation" in which some guy from another part of the company who is a history buff of said company gave us a bunch of information about how the water system works and some of its history. I thought the most interesting part was about a blind meter technician.
I don't remember his last name now, although his first name was José. But yes, the man began working for the City Water Board in 1925, if I recall correctly, and he could tell which meters were bad by sound. He would then unscrew the bottom, replace the turbine and everything, although completely blind. Pretty cool.