Seat Identification Assistance

[DuckDuckMoose]

Good Evening All,

Just joined the forum and have been sifting through some information as I picked up my first C10 project recently. She's a long bed 2WD I6 (currently has a new unknown autolite carb I'm told), former 3 on the tree that after some research I was able to identify it being roughly converted to an SM420 4 speed. I'm going through it to get her to a road worthy state for weekend cruises and such. Wanted to see if anyone could help me identify what the bench seat is out of. Doesn't match any of the chevy stuff I've found up to '72. Seat is in really good shape and only the driver outer spring is broken so I will probably do a re-cover and try to find a way to mount it. Currently have the sliders off and it's sitting on the floor of the cab. I'm coming from the Jeep and aircooled VW world so this is all new to me for the most part but looking forward to learning more. Thanks in advance for any and all assistance.