Thanks Michael,
You are fast
How could I forget to check Artzi's website...
Only one that resembles my hulu type :
http://www.oriental-arms.com/photos.php?id=2335
And one very interesting type of hulu that looks somewhere inbetween hulu tumpang and hulu peusangang :
http://www.oriental-arms.com/item.php?id=2236
thanks for the info.
Strange by the way that often this ivory mouthpiece is not combined with gold on the handles.
in my opinion these materials both could indicate wealth and status.