Dodge Demon Rear Seat Compatibility?

Huh. The tan one looks exactly like the seat in my '74. And the black one you posted doesn't look any different as far as the shape of the seat bottom goes. The vertical pattern that's on that tan seat of yours wasn't used until '72, so, that tan seat you have can't be any earlier than that unless it's already been recovered. I would compare measurements between those two seats you have an then order a cover for a '72.