This was the last of the equivalent Lady Kenmore. The only mechanical controlled DD seriesa with any type of illuminaiton over the timer dial for both the washer & dryer. I saw the pair once in person when I went to Sears just to see what was on the floor. Had no idea this model existed. Had a little "rush" inside because of the silly little light. Was the only DD model that ever reminded me of the good ol' days. I think the 4th little knob as for Wrinkle Guard yes or no. My LK only had 3--temp, signal, and start. It was the only dryer that had the exact symmetrical balance with the washer with the same number of knobs.