Dave Sr. from SWISCO responded:
March 15, 2016
Thanks for posting. Please take a look at our 39-171 and 39-317 operators and see if either match up to yours. Make sure our dimensions are the same, in addition to the style of the arms. As for that lock, it might be the 38-036, but I'm not sure. Do you have another window in the house with the same lock? If so, send us some photos of that window and the hardware removed.
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