Crank

We can probably supply a match for this operator. We offer a ton of this kind of part, all of which you can see here. I'm going to need a bit more information before I can recommend a match, though.

First, can you remove it entirely from the window? Next, I'd like to see one shot that clearly displays the installation hole pattern in one photo. Finally, show me a picture of the link arm. This is the short flappy arm that connects to the linkage in the window. Once the operator is out of the window, you'll know if when you see it.

With that information, I should be able to find a good match for you. Also be sure to watch the video below, I think you'll find it very helpful.