I've got a 520
Which is the base model.
4 water temps, infinitely variable water level, 2 main cycle types, Fast/Fast/Long and Slow/Slow/Short.
These machines have an action like a ramp activatored GE and hold a huge amount of clothes for that era. Those Hoovers are one of the few machines that holds more in a load than my 5.5kg Miele. The amount I can stuff into the Miele takes two loads in a large capacity DD whirlpool.