Rocco's tactic, often referred to as the real Catenaccio, was shown first in 1947 with Triestina: the most common mode of operation was a 1-3-3-3 formation with a strictly defensive team approach.
In Helenio Herrera's version in the 1960s, four man-marking defenders were tightly assigned to the opposing attackers while an extra player, the sweeper, would pick up any loose ball that escaped the coverage of the defenders.