Knife lock shoe

A quick learner from USA says:
Hello this is Brian with a code number for window parts. D69821
Could you see if something could work for me? Thanks
User submitted photos of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hmm... I'm not sure if we have an exact match for this shoe. I don't know how important that extra leg is. Our new 15-026 might be a possible match, but I can't be positive. What is the function of that extra leg? Would the shoe still work without it?
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