Can 39-254 be used for my Andersen window?

A quick learner from Rochester ny says:
is this a comparable replacement for and Anderson Operator circa 1960-74. The arm length is correct and looks very much like our present operator

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Tom from SWISCO responded:
Hey, Donna. I'm not sure what operator you have, but I don't think our 39-254 will work for your Andersen windows, as it is Truth brand. Are you sure you have Andersen? If so, check out our Selection of Andersen Casement Window Operators and see if any of these will work as a replacement for you.
A home owner from N.J. says:
they work,however it's a little labor intensive.the roller has to be altered,diameter and edges have to be ground . the unit has to be set in lower to compensate for the difference in height of the arm.I used a dremmel router.use the anderson track.the swisco won't work.anderson is nuts on thier prices. my windows were casements made in 1973.
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