A quick learner from Indianapolis says:
September 4, 2016
No names markings or numbers that I have found on these windows.
Mike from SWISCO responded:
September 9, 2016
Thank you for reaching out to us. We are always happy to help. Why don't you take a look at the 26-106. We believe these should fit your vent locks. We suggest you match the dimensions up to yours. Once you do that please get back to us with your thoughts