This is a fascinating sub-set of products. Most of the washers were large capacity, however the majority of the dryers were not. They had a mish-mash of features which could not be found in similar machines on the Sears floor, and seem to have been produced in decent numbers based on the number of times I've seen these pop-up on Craigslist.
The first machines were standard capacity and had straight vane agitators. Later there was a basic direct drive (never saw one) with the DD version of the straight vane. The 1980s large capacity models all had (there were three models) the Penta-Vane. (That agitator kicks arse, by the way...)