Hello,
The pictures depict the rod that allows the inside upper window to slide up and down and keeps it in place. I don't know the name of the part and the manufacture of the window. The windows were installed in my home about 20 years ago and they are slidine down on their own. The company that installed 16 windows in my home is no longer in business. If you can find a replacement, I'll need enough for 4 windows at this point in time.
A few years ago you were able to match up the locks for the same windows..
Let me know if you need any additional information.
Thank you,
Bruce