Looking to match-up a Black Pregnant Roto-Swirl with a Big "K" Agitator Cap for a 1962 Kenmore Model 70. Please give me a shout if you have one in good condition to sell.
However, the rounded shape of that rubber Scrubber-Cap indicates it is for a Manual machine. The Manual Kenmore's had a scaled-down Roto-Swirl that was specific to that application.
Looks like both of those "K" Caps are for the Manual Kenmore's.