Casement Crank system

A home owner from Vermont says:
I have a broken Truth #30818 system. Does your #39036 replace this?
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Tom from SWISCO responded:
I'm sorry, but those numbers don't tell us anything. The 39-036 code you gave us has no direct correlation to anything stamped on your part. The stamps you see on your part are not identification numbers, and manufacturers change them from year-to-year and region-to-region. They are not a reliable method of finding the best match. If you were to show me a picture of your operator out of the window, I can help find a good match.
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