Black clip on operator
Thanks for your patience during this busy season. I'm sorry to say that I don't recognize this setup either. I can tell you with confidence that we don't sell that same guide at the end of the arm, but the operator itself appears to match our 39-393, not 39-341. You have two hinged arms rather than a hinged arm and straight arm. Either way, this is designed to be used with the 39-424 sash attachment.
What I'm hypothesizing is that your sash attachment was a different version. But these sash attachments don't serve a very complex function; it's mostly a connection point, just to give the operator something to plug into at the right angle.
Do you know if that guide you have served a specific function? If it was also just a connection point, I do wonder if our 39-424 would work in the same capacity.