Hello all,
Thank you for your input.
I followed the advise Spiral gave me and i sent a mail to Aoi Art. I hope they will take the time to give me an answer.
Estcrh,
If there was a description of the seller i would gladly post it, but there is none. I bought it at an auction and i was struck by it for sentimental reasons.
I certainly may hope a grinder wasn't used

When i recieve it i'm probably able to tell you more.
For me the value goes beyond the money, although the price i paid wasn't a price bringing up big expectations of a superb blade.