Without looking at my brochures saved on my computer, I cant tell you WHICH model they are, but they look from the x10 series which is about 1979/80-ish to around 1985.
The washer I think is a Fabric-matic single speed, not sure capacity, and the dryer looks more TOL to me.
These should be very dependable machines, and if youre willing to put some work in, they will be VERY dependable machines. If you rebuild them completely, they will last another forty years.