Dave Sr. from SWISCO responded:
March 27, 2017
I've seen this operator a bunch of times before, but I don't think they're available anymore. At least, we've never been able to find a source for it. I suspect it was discontinued. I suggest looking at maybe our 39-220 and 39-221, along with the related handles, sash brackets and gaskets I've related on the right hand side of this page. This hardware is similar to yours and might make a good replacement, but I can't be sure.
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