Where does it say ITI on your gauge?
on my hUR/ITI, the "ITI made in Italy" was embossed on the back of the (cheap) plastic container.
Before finding Joel Levine, I was in contact with an Italian shop that does the same thing as Joel, and they told me "ITI" was only manufacturing the container, the actual mechanism was from either Korea or Japan.
I combed the Italian Moto-Guzzi forums, and tried to find an Italian company with an ITI brand name, did not.
hUR and CEV in your case, may have been only doing the face plate's serigraph printing.