Thanks a lot Alan for your answer.
Also I have many unsolved doubts
I showed the first hilt to an art-tribal's seller in Milan and he said "probalby original" but, of course, for me is not enought.
But in Kerobokan (Bali) i saw years ago another similar hilt (jointed to a litlle piece of rusty corroded iron) in a shop very famous for his reliability in tribal art dealer world (I woul like to know if, in the same condition, iron and bronze are the same corrosion or a different corrosion's speed)
I found the second hilt in a home outside Yogya. The seller had a lot of nice old wood and ivory Cirebon, Tegal, Madura hits... and together the unclean bronze second hilt under discussion: his prize was the same of a honest ivory hilt (but... of course ... in all world the prize changes according to the numbers of successions an object has).
A strange matter that probably is not good for an old aged confirm is that the hilts are enourmously alike.
Thanks again and sorry for my english
Marco