Replace seal or glazing

Thank you for reaching out to us. I am afraid this seal is too damaged to ID. In order for us to help, we would need to see one in better condition. Is there an identical window in the house? If so, we can use that as a reference. 

This part is still too damaged, unfortunately. Our 58-170B would be my educated guess but it's just a guess. Take a look at the specifications and see what you think. If you'd like to order a sample, let me know! You would just have to pay for shipping. 

Profile view and dimensions for 58-170B