I did find some info. Maschio Gaspardo is the brand owner. The name "TerrAnovA" is a production plant in Cadoneghe (Padova) acquired by Maschio Gaspardo in 1975.
On the SN tag is the Maschio name in graphics.
MASCHIO GASPARDO NORTH AMERICA, Inc. is located in Dewitt IA
But I still have very little info about this tiller.