The washer is late 1960s. The dryer is older, I believe, like early 60s maybe and has the low wattage heating element. The top can be removed and it can be installed under a counter.
I had that dryer, years ago in my first house. I bought it at Salvation Army and it was a good thing that timer had lots and lots of minutes on it, that was a fairly slow dryer. The lint filter is a snap-out type in the back of the drum bulkhead like the portables/compacts.
That's a BOL Kenmore dryer...........one heat selection..2 hour timed dry cycle... 10 min air fluff cycle....lint screen in the drum like the 110v portable dryers...late 60's vintage, I think.