A picture is attached. The arm has "Getty" stamped into it, and the screw hole measurements are indeed 4-3/4" and 3-7/8", but the body is curved in a slightly different way. And on my old part, the helical teeth are very visible.
Is the 39-044 the one I want?
I suppose an operator with a differently shaped body would be fine, and I'll just need to do a little paint work.
