Window crank

Hello! I believe what you're showing here is an older version of our 39-226. They don't make this with a button anymore but it should still work the same regardless. 

Just note that this has a 5/16" hex spline. I am not 100% sure that yours has one, as well, since I can't see it. The 39-226 is more of an educated guess at this stage. You should remove your handle to verify that it has a spline in the same size and style.

Side view of 39-226

Alternate view of 39-226