Bill, the reversing switch I mentioned is on a 46-400 Rockwell/Delta Heavy Duty Lathe. The switch is made by Dayton. I cannot find the old Rockwell catalog, which I know I have somewhere around here, but I do know that the switch was installed in a pre-determined spot that was formed in the base of the lathe stand. The catalog referres to it as a "drum switch." It does have a handle that rotates 180 degrees.
I use this lathe infrequently now, mostly for polishing and most recently for spindles longer than my PM 4224 will accomodate. The Delta has a filler block for the lathe bed. This filler block can be located beyond the lathe ways and the tailstock can be put on this block. It takes a LOT of finaggling to get it set up accurately, but it does work very well.