I first saw one of these at the Hotel and Restaurant Show at the Javits Center in 1983. The model I saw had two of the old Whirlpool/Sears black straight-fin agitators. This is the kind of machine grand houses would install in the "cottages" for their Laundresses. I would enjoy using one of these as my daily driver.
I was going to make a thread about this but I don't need to all thanks for the search tab. I knew UniMac had commercial top loaders like Speed Queen but recently I looked online on their website and saw they don't offer that anymore. But I didn't know this existed and I find it overall very fascinating.
Market for commercial top loading washers of old is decreasing IIRC. OPL, laundromats, multi-family housing and others more and more have moved over to front loading washers.
With above in mind it's not surprising UniMac no longer offers top loaders in their commercial line up.