Dave Sr. from SWISCO responded:
March 1, 2018
I'm afraid I can't tell what operator you have for this window. One major detail that is obscured in your photo is the style and size of the linkage. I also can't make out the mounting hole pattern. I would start by looking at our 39-054 operator to see if this is the type you need. If not, we will need clearer photos of the details I mentioned.
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