I'm Surprised!
I always thought Speed Queen had a great reputation in their McGraw & Edison years. They seemed very popular with laundromats, as I seen more SQ washers than other coin-op brands. And I've seen just as many Huebsch dryers, also made by M & E at that time.
I know that there were a few redesigns throughout the years. The 50's SQs had a one-way tranny with cycles changed by the loud "clinking" solenoids. The motor ran constantly, from agitation directly into spin, and neutral mode during the fill and coast-to-stop at the end. The 60's models had a 2-way tranny, with a pause between the agitation and spin. A tub brake was added sometime in the 70's. When Raytheon took over, the washers were completely restyled and switched to perforated tubs. Now I understand the Alliance models are all new, and kind of a joke.
Huebsch dryers had the old "down flow" heat design until the 80's, when Raytheon took over and introduced the "axil air flow". The new Alliance models now have 2 motors; one driving the drum directly, and one driving the blower. They also now have reverse tumbling as an option.
Gary