Searching for Jealousy window cranks 1973

To know which awning operator you need, you'll have to remove the old one and show us a photo of it from behind, with the hole pattern on the top and bottom tabs in clear view; we'll also need a side view of the entire link arm that juts out of the back of the operator, including the hole at the end of this arm in full view. From there we should be able to help. 

I am afraid I can't quite make out what you need from this photo. Without showing us the operator from the rear, with the top and bottom tabs in full view, as well as fully removing the link arm for view, I can't narrow this down. I apologize for any inconvenience.