This is other example of warangka Deng Udengan (Shape of shrimp) with central carved motif called Rangkerangan (shell & snail?). The hilt’s style is called Tumenggungan , It’s a symbol of Kuda Panuli (Panuli horse).
@Amuk Murugul : I stil dont get it really about your questions.
It seems to have a beautiful patina.Congraturation