Not found in Legendary

It looks like Velour. Not factory I don't believe.

Valiant Brougham and Dart SE could have velour buckets, even in four door cars.
IIRC they were only in limited colors- burgundy, tan, green come to mind.

Can't see enough of the stitching and fit and finish to judge if the "herring bone" looks like a factory job.
90% of the time you can tell an upholstery shop's work unless it's a mega buck shop and even then sometimes you can.