I must say I was very pleased to get rid of both my Olympic knives and I would never buy any more.
I have seen a blue diamond HJ knife on Wittmanns site some time back. He sold it for around $1900. (Good or Bad)? don't know but I think I would pass.
I have a green diamond without the knife (diamond only) and in my opinion definatly POST WAR.
We all have an opinion but at the end of the day the owners of these knives have to sell them some time and in my expierence unusual out of the norm items are harder to sell so for me I will stick to the tried and tested daggers and knives that you know they will sell quite easily when the time comes to letting them go.