By the late 60s, enzymes were a big deal. KitchenAid even came out with the soak cycle in the 16 series which was meant to use an DW enzyme product that did not seem to take off. The Lady Kenmore Combo Super Wash became the Enzyme Super Wash even if it was only 4 minutes long, but, hey, they slapped "ENZYME" on the cycle and on the control panel. Sears was not going to miss the enzyme wagon so I guess that is why this timer dial has "Enzyme Soak." Think Biz, BOLD, DRIVE, PUNCH, TIDE XK and others
It is indeed a beautiful set. What is the selling information?