Need to replace my window operator

Hi there, thanks for reaching out. It appears you are looking for a new crank handle or operator. If the gears you show are worn down then you'll have to replace the operator. To help determine your operator we'll need to see a bird's eye view photo of the hinge arms. Thanks!

It's tough to make out, but you could have either our 39-083 or 39-140, depending on the "elbow to elbow" measurement. Look them over and see what you think.