Saw this on e-bay but I do not know what it does. ??? Maybe a dimmer switch of some sort. ???
http://www.ebay.com/itm/1920s-FORD-MODEL-T-PRESS-CRAFT-ROAD-PILOT-5-IN-1-THROTTL E-LEVER-SWITCH-MIB-NOS-/371626207556?hash=item5686a5e944:g:03gAAOSwt7pXNURY&vxp= mtr
Here you go Donnie. I posted my NOS one in the original box with instructions under ACCESSORY OF THE DAY at this link.
Thanks Jay. Looks like my guess was correct.