When did manufacturers start offering two speed washers? And why do they offer two speed washers? I ask because I have seen plenty of low end models that achieve a delicate and permanent press cycle via single speed motor. Case in point, page 15:
https://c.searspartsdirect.com/mmh/lis_pdf/OWNM/L0305277.pdf
https://c.searspartsdirect.com/mmh/lis_pdf/OWNM/L0305277.pdf