Sometimes damage on nibs defies explanation, check out this Mont Blanc 149 nib severely cut down.
What to do? Well, I did my best and the owner was so happy he wrote this;
Do you know the turn-around-time of all other fountain pen repairs companies???Amazed that my pen arrived today. TODAY. And the nib is a dream come true. Deepest appreciation.
And this pen will be passed down in my family. All use fountain pens. I am sending these photos by e-mail today.
I will write down who created this nib.
I wish I had known about you and your services years ago. Many others will.