The work was paid by the first inhabitants of La Plata but, as maintenance was very expensive, it was donated to the Province of Buenos Aires.
* T-28 Model 1938 ali T-28B — verzija z izboljšanim topom L-10 76.2 mm, izboljšan topovski stabilizator in nov motor M-17L* T-28E ali T-28C — verzija z izboljšanim oklepom.