window crank mechanism

A quick learner from san jose, ca says:
Anderson window. The Arm length is 14" from pivot point to pivot point. Thx
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Check out our 39-332 operator. I believe you have an older version of this. If you window was manufactured between 1995 and 1998, you will also need to use the 39-362 sill adapter plate to install the operator.
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