I believe that means it wouldn't allow the use to choose temperature and speed selections that weren't appropriate for Wash 'n' Wear articles.
The stainless steel top really sets these Blackstones apart stylistically from other makes. The only faux pas on the console is the use of the dated 1930s-looking knobs for temp and speed controls. Lots of flexibility with three cycles, all four speed combinations and six temp options.
Interesting, though, that a choice of water level isn't mentioned. No dots on the FILL portion of the cycle dial to help delineate medium and low water levels ala Speed Queens of the era. And like some other timed fills, you'd have to return to the washer to get a lower water level for the rinse (GE comes to mind). Frigidaire, I believe, sped up the timer increments when the SMALL LOAD cycle was chosen, ensuring a lower water level for both fills.
Have never known anyone with a Blackstone. Three cheers for AW collectors who post videos so we can see these more obscure machines in action.