A quick learner from New Port Richey Florida says:
March 4, 2019
In the house I rent the windows are old from 1976. They are single pane aluminum. These little clips are broken and I was wondering if these Pan Am clips you have will work in my windows. I have attached 2 pics of the broken one for you to see
Bob from SWISCO responded:
March 5, 2019
Thanks for posting. Yes, the 16-023 looks right to me. Review the dimensions and see what you think.