I am not a metalurgist, but with my practical knowledge I have a few questions / remarks.
- A file is hard and brittle. not the best material to make a knife
- a file is often not as broad as this knife is.
- a file's surface is often flat while this blade is getting thinner towards the edges is away that I have never seen in a file.
So if you would reshape a file, the original grooves of the filw ould remain vissible in th emiddle but surely not towards the edges.
So my idea is that this knife is not made from a file, but maybe the grooves/stripes are caused by shaping the steel, with a very rough file.
So in fact they are filling marks
