Truth wooden casement operator replacement

A home owner from nevada city , CA says:
This is for an older Anderson wood casement window operator. the arm is 9 1/2 inches long. the number on the base is 45047. The number on the arm is 40530. The gears are worn on this on and will no longer crank correctly...Thank you
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Dave Sr. from SWISCO responded:

I recognize this old operator you're showing us. These are not made anymore, and we can't be certain if anything we carry can work in substitution. The closest we have are our 39-216 or 39-028E. I've also placed a list on this page of related parts you may want to look over.

One of the major poroblems with using either of these two operators is that they will likely not fit your present sill or sill trim. You may want to contact a local professional to come out and look your windows over to see what they suggest. If either the 39-216 or 39-028E can work, they'll require adaptation of your sill and I cannot be sure as to the capacity. 

I apologize we could not offer a better solution for you.

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