The glass is loose. There are small egg shaped retainers that slid into the frame to keep glass in place
A quick learner says:
October 5, 2019
I need the retainers
Bob from SWISCO responded:
October 8, 2019
Thanks for writing in. It's difficult to say what you need without seeing a photo of the original retainer but start by looking at our 32-325. Look these clips over and see if they're what you need.