Welcome. Those are bucket seats for the WWII open cab weapons carriers, I’m not smart enough to say 1/2 or 3/4 ton, but the guys at Vintage Power Wagons will know and likely will be interested in buying what you have.
In pic #4 the near seat with the springs is late model open cab WC, the bucket in the rear of the photo is early WC open cab with the crash pads and snaps on the outside to hold them in place. Both 3/4 ton
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