Rare as hen's teeth those early ones are, they were only used for a couple of years before they went to the open column design that lasted through the end of that style into the 80's.
Were those first turquoise Power Fins like the agitators on the A702's that had that baffle underneath the agitator that diverted water from inside the column where the lint filter sat down into the bottom of the tubs?
Also, those small lumpy vanes in between the vanes, did they do anything or were they just "there"?
Here's a quick scan of the '66 Maytag washer with the first of the power-fin agitator. You can see the added "fins" on the skirt of the agitator, there were channels that water was moving through while agitating. Under this first Power-Fin was a similar construction as the black Gyrafoam agitator.