Resistor in ignition circuit .... question ??

[Crazy Horse]

Someone has wired in a 1 ohm ceramic resistor into the ignition circuit of an 8N Ford (side mount distributor). I suspect the original wiring has been changed around a bit but that shouldn't make any difference to my question. So, original 6 volt system supplies power into an ON/OFF ignition switch and a line comes out from the switch and heads off to the ignition components. Any guesses as to why somebody wired this up in this way? The tractor starts and runs the same whether the resistor is part of the wiring or not.