Window crank and cover

The crank handle came out of the mechanism. The window is a side out (left to right). The crank cover lays up against the ledge. The cover looks like part 39-322, but it isn't brass. It looks like white metal. I don't have any pictures, but I can take some. The part that holds the crank against the cover came apart and the crank handle fell out (off).

I took some more pictures, which are attached. I also found a number on the smallest arm that attaches to the window on the hinged side. I took measurements the best I could. The number on the small arm is: 20755. My measurements, with the small arm unattached was ~ 3.5 inches and ~ 9 inches for the long arm. The arm with the roller on the end does not seem affected. I hope this helps. The attachments screws (4) that hold the mechanism in place seem to be hard to get at since they are under the wooden molding, with not much room. Thanks. Pat