My Maytag wringer came with same black agitator, and yes it does kick up some powerful currents in square tub.
Swap it back and forth black lint filter/dispenser agitator for fun. Really try to use the turquoise last incarnation because supposedly it helps keep water from getting where it shouldn't. But darn thing doesn't have a water line marking, nor seems to kick up same powerful currents.
Hope someone nabs this Maytag wringer.