Let me post some updates... from the german forum. There was a series in the 80's of Adam Cues by trademark BiXur. Luckily for me one person still has the original prospect and he was kindly to upload some photos. Here they are!
So... the cue I bought was a BX-1 BiXur and the price was something about 25$. It looks vintage and was preserved very well, a few dings on butt but nothing serious, dead straight and it weight about 20 oz ( 4.29 the shaft and 15.64 the butt ); about 13 mm on top with 8-12 Pro Taper on shaft. The tip was there to but I didn't like how it looks so I change it with a Soft On Cyborg Tip... this week-end I will play with it so I will post some impressions about it... I can't wait to shot a few strokes with it!