Page "Self-propelled anti-aircraft weapon" Paragraph 10

Larger guns followed on larger trucks, but these mountings generally required off-truck setup in order to unlimber the stabilizing legs these guns needed.

One exception to this rule was the Italian Cannone da 90 / 53 which was highly effective when mounted on trucks, a fit known as the " autocannoni da 90 / 53 ".

The 90 / 53 was a feared weapon, notably in the anti-tank role, but only a few hundred had been produced by the time of the armistice in 1943.