Awning window cranks
We still sell a few of these old "box" style awning window operators, but I unfortunately can't make out what you have from these photos. The link arm isn't visible, but that's an important detail that we can't do without. Is it possible for you to remove the operator from the window and show me a clear photo of the link arm without obstruction?
Seeing the link arm without obstruction is the only way we can help at this stage. If that's not possible, then the best I can offer is for you to look through our complete selection of awning operators here. Just note that this "box" style operator you have is very old and these aren't really made much anymore. Our selection is reduced from what it used to be years ago. Just something to keep in mind.