Those coils were used to remotely ignite gas lamps. The lamps were mounted high enough on a wall or post to be out of reach. Inside of the globe was a device that worked similarly to a low tension ignitor on a gas engine. The lamp ignitor mechanism was connected to the gas valve through a rod and handle that extended down to within reach of the person tending the lamps. To light the lamp, the coil and battery were connected to the remote lamp terminals. When the handle was pulled to open the gas valve, the ignitor was simultaneously struck thus lighting the lamp.I've never seen one of these before but does 'gas light' have anything to do with the 2 studs? Spark jump between them or they make contact when mounted in a gas heater and send the spark to ignite gas?
I am just guessing though.