How to tell the difference between 70-76 dart swinger rear seats

toolmanmike said
71 Duster and Demon 340 had herringbone interior. https://www.hamtramck-historical.co...ook/1971/71_Fleet_Plymouth_Color_trim0002.jpg View attachment 1715241165

I thought the duster rear seats fold Down? Hmmm.. maybe it’s from a 4 door Valiant? So from the chart..this seat came from a 1971 car. Just knowing that helps out a lot. Thank you toolmanmike:)