Wish I had more examples (seems more early than late cars) appears there is a pattern to method used to attach them
Posted each below for your, review, use and application if you choose to. Stayed with Mach I's so that the confusion of the longer/wider seal would not confuse the discussion and I also had more Mach's with AC and the seal

0T05R1066xx - Screws

0T05R1082xx - Screws

0T05R1100xx - Screws

0T05H1199xx - Staples

0T05H119xxx - Staples

0T05R1453xx - Staples
