The dryer that matches this model is or was in the museum. Friends had this washer, but only the maid was allowed to be around it. I was hustled past the laundry area and upstairs. It died while they were away on sabbatical in 1960 or so and was replaced with a Kenmore.
If you can use the Searcholator, you can find a discussion about why the Unimatic could not be a two speed mechanism so it was not until 1959 when the multi-speed belt-driven mechanism was introduced that Frigidaire could have a two speed washer, but the 1140 rpm spin was gone.