Melvin -
That's a pretty common machine actually (I will admit to having three of them right now). It is a 1983 Lady K model, which was widely available from 1983 through 1986.
The design with the three knobs came about in 1979 or so, when two formerly separate knobs were combined into one. Prior to, there had been a soak selector knob (soak on or off) and a second rinse knob (second rinse on or off).
The new switch accomplished both functions, but I have to say it made the panel look "off balance" with two knobs on one side and one on the other.
There was a '79 version of this machine, an '80, an '81 and an '83 (no '82). The first three years they did not include the triple dispenser. All led up to the 1983 Lady K, pictured above, which was the first mechanical timer Lady since the mid to late 70s. The electronic machines had become the Limited Editions.
The machine apparently sold like hotcakes (everything in Kenmore's line did in the mid 80s) and was one of the last machines available when the belt-drive line was closed.
Gordon