This gas shut-off was being used as a water shut-off on a very nice home next to the Sudden Valley golf course. We found it while replacing the water service--the pipe from the water meter to the house.
Notice the narrow opening in the valve. All these years this 3 bathroom house was suffering with an undersized water service and a gas shut-off.
We installed a proper water service and a full port ball valve.
House is happy, homeowners are happy, plumbers are happy, but a little sad some numby installed it in the first place.