Thanks Melvin. I was a ways off. The landlord said in 1990 they were 'almost new'. Guess for appliances back then 9yrs light use was 'not very old'. 10yrs later the dryer timer was going bad and I had to replace a gas valve coil, that's about par.
Pictured is a 24” belt drive model. Sears was always good at holding the same model over through several years with a minor revision. So it is possible that they could have been built several years later but the actual model was introduced in 1981. In the 1986 catalog there is a washer with a control panel identical to the one shown here but it is a 1983 direct drive model with a dual action agitator.