Rusco tilt latches

A home owner from Fredericksburg, VA says:
the only names and markings are the large "R" or "L" and a Patent No: 5,671,958, which probably won't be helpful.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. based on your pictures, I would recommend our 26-243 and 26-244 tilt latches. Look them over and tell me what you think.
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