casement crank assembly

A professional from Ventura, CA. says:
Hello, I am looking for a replacement assembly. This one is an older Roto P4600. The arm measurement is 9". There are only 2 mounting screws and they are 4 3/4" apart. The end of the arm has a stud on it that is about a 1/4" tall that fits into a sliding reciever in the bottom of the window.
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Looks like you have the older rectangular-style Roto operator. Take a look at our 39-283, which is the new round style. I believe that should work as a replacement, but carefully look it over just in case.
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