Hello Marius,
the blade of your keris seems to be old but I believe that the scabbard and hilt are very recent. Could it be that you have bought it from a Balinese dealer? The hilt is in the style of Bone keris, see for example here:
http://www.vikingsword.com/vb/showth...ghlight=toraja
I never have seen such a keris in silver, all I have seen has had golden colour, worked from brass or gilded silver or even thin gold foil.
The workmaship is very good by your keris but like said I think very recent and probably worked on Bali. The figure I don't know by name but I think that it is a Hindu figure.
Regards,
Detlef