The word at the bottom of your decal is likely the city where it was made. I got S-A-????
It is not any of the big boys (assuming 30s/40s based on the geometry) - Not Bianchi, Ganna, Lygie, Frejus, Olympia, Gloria, Legnano, Wolsit nor Umberto Dei.
You are almost certainly correct. Not a big name. The name of the city would be at the bottom. Likely one of the hundreds of small frame builders of the day.