Hello Man of Lint,
Surely with your imaginative name you, and only you, would be familiar with the cursive writing found inside a pair of Bontoni shoes.
I recently purchased a pair of supposedly Bontoni shoes from a fellow in Australia who in turn secured them from an estate sale.
Neither he nor I am sure if they are Bontonis. Notwithstanding that, they look and feel like no other shoe that I've ever owned - pure sliken(ly) smooth in both appearance and fit. I am so enamored with them that I just have to pin down the artisan who created them.
Any photos of signatures/writing inside of Italian shoes that you're familiar with? The writing is just like the writing you'd find in a signed pair of Lattanzis.
Many thanks for reading this Oh Man of Lint.
All the best,
Mike