Window crank

Hi there- thanks so much for posting! 

Looking at your photo, it appears that you have an older style Silverline awning window. The original operator is no longer available, but take a look at the 39-205. I've used this operator as a replacement for this window and found it matched up pretty close to the original. Just in case I'm wrong, you should carefully go over our dimensions just to be sure they all match up. You can never be sure if yours is the one Silverline window that happened to use something different.