Timed fill on SQ
From what I learned, all of them were like that, until 1980 when the perforated-tub machines were introduced. There was a fairly late solid-tub machine on Craigslist in Dallas (that someone else grabbed before me!) that still had no water-level control, and the timed fill was one of many things CR complained about in both their 1972 and 1974 washing machine articles. The other complaints were the tendency for socks and small items to go over the tub while spinning, and the capacity. Needless to say they were never rated very high...