Hello Athanase,
I think you have there two legitimate Lopah Petawaran, both a little bit unusual but I think they are both members of this rare knives. I nearly bid byself to the one with the face on the handle. Congrats!  
 
 
See also this thread: 
http://www.vikingsword.com/vb/showth...ight=Petawaran
Regards,
Detlef