The wide sans-serif typeface for "Digiuni Luigi" is also used in the label of Carlo Carletti. The remaining texts of the Diguini are in OS Expended and Scotch/Modern perhaps? But that's not the point. The brands in this bass is also very interesting, the first in Art-Nouveau style, and the second, normal sans serif. Answers on the wide sans-serif and the brands will be greatly appreciated. link: https://www.italiandoublebasses.com/digiuni1931.html
The wide sans is Bastoni larghi. I don’t know where it originated.
Here’s the page from the post-1952 specimen by De Luca (scan courtesy of Hans Reichardt):