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There is very little information about this company, and its date of foundation is not known, for which we can only indicate the upper limit of 1954, because in the same box in which it was found [[:File:Ero-Piston-Instro-Recto.jpg|this leaflet]] there were also [[:File:Talloncini-Territorio-Libero-Trieste.jpg|two heels]] of the monopoly of the free territory of Trieste (''"Libero Territorio di Trieste"''), established from 1947 to 1954.

There is very little information about this company, and its date of foundation is not known, for which we can only indicate the upper limit of [[1954]], because in the same box in which it was found [[:File:Ero-Piston-Instro-Recto.jpg|this leaflet]] there were also [[:File:Talloncini-Territorio-Libero-Trieste.jpg|two heels]] of the monopoly of the free territory of Trieste (''"Libero Territorio di Trieste"''), established from [[1947]] to [[1954]].