Thank you all for your (for me) very important advices and Good Lucks !
Unfortunately, miracle did not take place and I found out that the blade was made of, I would say, normal steel (there was some parallel lamination, but always accompanied with relatively deep pitting, so I better polished it again after three very quick attempts.
Very important was the piece of info from Spiral "to have uninterrupted time, turn your phone off & don't answer the door!". But when I cut my finger and the result was not "slightly yellowish", but "reddish", it was like phone ringing and at the door knocking etc altogether.
This is also the sword from this thread:
http://www.vikingsword.com/vb/showthread.php?t=19145
And Here are the requested close ups - but as I said, no "damascus".
Thanks once more
Martin