While looking at a 1929 Kohler plumbing fixture catalog online, I saw they made (or sold) a wringer washer. It even came in all their fixture colors! They also had a combination sink-clothes washer, similar to their sink-dishwasher.
Modern beauty and usefulness in plumbing fixtures. : Kohler Company : Free Download, Borrow, and Streaming : Internet Archive
72 p., ill., 23 cm, trade catalog
archive.org
