Dave Sr. from SWISCO responded:
July 3, 2017
You might be able to use the standard type of operator like our 39-005, but we also have a kit with different length arms. See the 39-346. Your operator attaches to the window linkage with a type of stud, while our newer types use a screw to attach to the linkage in the window. I'm afraid we won't be able to get an exact match for your old part, but you may be able to use one of ours as a substitute.
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Tom from SWISCO responded:
July 6, 2017
Both operators Dave recommended can work for either side interchangeably.
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