This giant porcelain insulator comes from a substation, I suppose from the old 132 kV of Cismon del Grappa (near Bassano, Vicenza, Italy) that was operative in the 1920's. It is 1.5 meters tall (about 60 in) and 0.8 m diameter (32 in), white porcelain, unmarked. Today it is used as an "artistic" installation in a public park.