Newbie wondering what year/style of bucket seats are these

I found 'em. 1971 Dart GT and Custom and 1971 Plymouth Scamp. Legendary makes replacement covers. To check it out, go to Legendary Auto Interiors. At the top of the home page on the right hit Custom Design Center. Type in 1971 Dart, then click on 1971 Dart GT. Same intricate stitch pattern, same metal emblem in the seat backs, check out the bucket seats and then the back seat. They are truly excellent seats!!! I would bet that the hinge covers on yours are metal. If so it was an early 1971 model (before 12/1/1970) and takes the newer style seat back. They were the high end interior for that year. A new set of seat covers like that would run you over $700!