Different ag
See Robert's thread/pic I referenced. It's like a monster version, three-vaned, of the drag-o-matic agitators used in the earlier sixties--thick, thick vanes with reinforcements across the top of each vane. The Darth Vader of agitators. I've also seen MW machines with black Bakelite ones that had sculpted/spiraled vanes. This preceded the familiar four-vaned, broad-based polyproylene ones we know and love as the later burpalator line.
Lint filtering was done via a recirculating flume at the back-middle of the basket at 12 o'clock, with a filter basket that would hang there. No burpalation.