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68-72 Cutlass 442 F85 Bench Seat Stainless Trim Molding Chrome - Original Set
Very nice bench seat trim removed from a 1970 Cutlass S. The trim has some age appropriate wear, scuff marks and a couple minor dings. Includes original attaching screws but not the acorn nuts.
Not sure if you mean these exact moldings or just any kind of trim but all Oldsmobile bench seat that I've seen have some type of molding/trim on the seat edge.
I've looked at mine and don't feel any mounting surfaces through the material. I'm pretty sure my seat was a replacement with a generic. Yours look consistent with your year description.