Thread: Riccardo Tonarini razor

N690 is a European steel, I think it is made in Austria. It's a good knife steel and in my opinion comparable to 440C. It should make a fine razor.
I don't know anything about Riccardo though. From the looks of his razors, I'd say he is a knife maker grinding razor shaped objects. Those wide flats on the sides of the spine are going to cause problems when honing and stropping.