« Superminimo : Sum paid to an employee within a company over and above the minimum wage fixed by the national collective agreement.
These payments may be the result of (company-level) collective bargaining, individual negotiation or a unilateral decision by the employer. Whatever the circumstances, they are one factor contributing to wage drift. »

Ça correspond donc à une augmentation du salaire minimum de branche, il faut voir comment tu tournes ta phrase avec les "indennità di contingenza" et "scatti di anzianità" qui précèdent.

Ciao, Jean-Marie