Dave Sr. from SWISCO responded:
February 24, 2017
Looks like your operator has an 11" arm like the 39-141 and 39-142, but I'm not sure if the end bearing would fit into your existing track. You might have to replace your existing track with the 39-504. Would that be possible? Also take a look at the 39-044 and 39-045 operators. These might also work on your window, but the arms are 9" long, so the window might not open up as far.
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