Thrilling forum

Tormento di anime (1953) poster credit, role uncertain, named as the mayor (more Musco !)
need to be confirmed later on

This looks like it's probably Nino on the left in this still from getty images Earliest role found so far ! (second one is from 1958)

Porno Erotico Western (1979) credited, as Man with 5 women.

FatmanDan thinks this may be re-used footage from an earlier film. It doesn't match with any of the identified roles we have for Nino so far, but there are still more films to be checked. Nino does look fairly old here, so it also could have been new, or at least recent footage. Identification by FatmanDan

Verginità (1974) credited as Salvatore's stable employee
very short role and suprisingly credited
Later on you see him also at the wedding ceremony
Pictures are not good, but can be upgraded later on
Also identified by Nick (see more Musco !)

Calore in provincia (1975) credited, as Turiddu

Provaci anche tu, Lionel (1973) credited, as Policeman

Il cavaliere dai cento volti (1960) as Dancing gypsy

In a TV commercial for the peanut oil brand Plauso (1974)

A qualcuna piace calvo (1960) as Investigating officer

I hadn't realised before, but Nino's father, Angelo Musco, was actually quite a big star in the 1930's.

He only appeared in 10 films between 1932-1940, 2 of these released after his death in 1937 at age 65, but in all of these he had top billing playing the leading roles.
Il re di denari (1936)
Lo smemorato (1936)