Claude,
We had discussion in a prior thread and came to the conclusion that the Model 60 rear window has bevel wood trim strips that are covered in the same fabric as it's surround rather than a metal frame as are on the door windows...This is also the way it was done on my 28 model 40 coupe.
Where Are You From? Leavenworth, WA / Yuma,AZ
Do You own a car built by Durant? A-22 Durant / M-40 Durant / H-40 Flint