The glass looks like green opalino and a nice amber. The placement of the label is unusual, but it does look original to me, so I would trust that it is Fratelli Toso. The underside of the bowl reminds me of FT's alligator bowls, but without legs. Maybe it is from the same time period, though I am not sure what years the alligator bowls were made. Most of the them that I have seen have decorations that look like the 1960s, but I am just guessing at the time.
I like the bowl. FT did several colors of opalino bowls that had vertical opaline ridges. Your bowl may fall into this category.