Bottom crank mechanisms

Hi there!

I'm afraid the numbers you've provided didn't match anything in our database. We can help but we'll need to see your operator uninstalled from your window so we can see the entire mechanism, arms and all. 

That will help us determine what operator you have, since there are a lot of different potential replacements at this point.

Hello! I think you can use our 36-048 to replace this old part. It's not exactly the same but as long as you replace the top and bottom at the same time then you should be fine.