Im thinking something i do not know if im right
I notice that in old times everything was made in purpose , and as we know ,that are so many thuri and coty layers , with diferent quality , i began to think ,that there is a diference in the smal stones and the big ones . Not a big and significant ,but there is .
I notice that the smallest sizes thuris and cotis ,i own are aways the finer stones , maybe because they were made for razors .
The biggest sizes thuri are a bit faster and coarser stones , maybe for the purpose of tool and peckknifes sharpening .
The coticules are also finer . The smalest size the fine is the stone .
Those are my observations and i think that the smallest sizes ,are purposely cut from the finest stratas of the rock , as they were intended to be a razor hones .
Dont think , that the people were stupid 100 years ago - i think that they have much developed skils and finer taste for the good things and for the practical use .
Why do you think is that fancy name and that wooden boz - The Celebrated Razor hone - remember - the Celebrated