Oh, I didn't saw that!! That means that by that time they still have the square ones!
After a good one hour cleaning the first window mecanism is done.It turned out great and it way better that my NOS one!! After going through the mecanism I found out that there is no way to get close with right finish etc on the mecanism. So this is the way it will be. When it comes time for assembly lithium grease will be added. Right now there is a big difference in how easy it goes.
However the bracket that bolts to the glass is dirty and need a good cleaning. I would guess that it is silver zinc.