TOPIC: Need help on info for Rare Gerstner Steering

I have a rare Gerstner Steering on my 1958 Pipestone. It is in fairly good shape works beautiful. Boat has been on water this year needs a little work on it.
I,m looking to find info on this and need to restore button to close original if possible. I,m putting the controls back to original place on the wheel makeing new cables, and control arms that are on collum.
I posted pic so to get opions and help if poss.