manghu67, thank you for paying attention to my message, I hope that can change something, guys on our local knife forums say that purchase of Boker Plus knives of good quality is a lottery.
I have eventually bought Colubris, I couldn't resist... picked up the one at another seller with deviations in the edge bevel height which looks more or less acceptable, I am going to use my Spyderco Triangle Sharpmaker to correct it. And what I must say here - thank you very much, the idea and design of this knife are amazing, I love it.