Need Help Finding Replacement Window Operator

Thanks for reaching out! The window operator have here is a single arm operator. The arm below the operator belongs to the casement window hinge. 

This operator reminds me of the 39-264 Andersen Split Arm Crank. It is used for both right and left handed applications. To confirm that this is the correct match, carefully look over the specifications and compare them.

For windows manufactured from 1995 to 1998 you'll need to use the 39-362 adapter plate. The other compatible hardware and accessories can be found tagged below this thread.

Dimensions for 39-264