@DFW_Zoysia that is basically the same mower as the Eastman SPX-21 / Ingersoll Commercial 21.
Here is an Eastman press release from back in 2010 about it.
The same mower has also been branded as the John Deere WE85, Gravely Commercial 21, and the BOB-CAT Commercial 21 - and maybe others.
Schiller Grounds Care (Mantis, Classen, Little Wonder)
acquired the Eastman 21" commercial mower line in 2017 to add to their BOB-CAT brand of commercial mowers.
Then in 2020 Doosan Bobcat (the skid steer company)
acquired BOB-CAT Mowers, along with the Steiner and Ryan brands of grounds maintenance equipment from Schiller Grounds Care. That's when they changed the logo and started painting the zero turn mowers white, orange and black to look like their construction equipment.
I don't see a 21" walk mower in the new Bobcat mower lineup, so that's probably when this mower got passed off to be rebranded as a Kubota.