Awning window

I'm having trouble finding this. It's a very peculiar design, especially with that squared end. Could you show me the base of the operator, as well? I can't see it in your photos. Can you also show me how the end of the arm attaches to the sash? Either the track, or bracket, or whatever it is your window uses. Thanks!

Thanks for clarifying. That will make things a lot more difficult. I believe this is an Andersen window, but I'm not sure. We have a variety of Andersen awning window operators that may be worth considering like our 39-206 or 39-389, but they may not be ideal for your application. I'm wondering if something like our 39-083 or 39-015 would be better, along with the 39-114L handle and 39-170 sash clip. Take a look at the hardware suggested and see what you think.