Re: Yes, it is a Splash Guard:
When I had my approx 1954 to 1956 Frog-Eye Kenmore Washer, it had the Pregnant Roto-Swirl Agitator and it had a more flat Disk-Like Guard, that was a real thick Rubber-Made item, that was placed on the Upper part of the Agitator, just for that reason, to prevent the Water from Splashing out, if you had the Lid Opened. It seemed to do it more on the Lower Water Lever {only 2-water levels, low and high} but it did some Splashing on the High Water Level as well.
OH! How I hope to locate another Frog-Eye sometime again here, I'll never let it go this time, like I did before.
Good Times and Happy Kenmore Washing, Steve
SactoTeddyBear...