Not too fast gentlemen!
I had no time to terminate the story last night...
Knowing what I know about HJ's and full red diamonds and keeping in mind the golden rule of collecting: "Buy the piece, not the story", I made my collector friend a proposal: If he would remove the diamond and it would be prooved to be originally mounted, I was ready to pay him 3X the knife's price.
Here is the (evident) result:
A3.JPG (113.93 KB, 146 downloads) A4.JPG (109.72 KB, 146 downloads)