A composed Malay keris; is it matching?

[Sajen]

Dear Members,

years ago I bought all this parts separately. Sheath and wilah in Germany at a weapon market, hilt in Indonesia and the pendokok in KL. By the sheath I am nearly sure that it is a Malay sheath, I think that the sampir is from Kettengga. The silver covers shows in my humble opinion typicical malay engraving. At the bottom is an arabic date, 1272 (?), so I think that the sheat is from 1855. The huge Bugis wilah is 35 cm (13,8 inch) long and have 7 luk. The big kerdas hilt is from very well patinated hippo ivory. The recent pendokok from silver was bought in KL.
My question: is it a matching ensemble? And from which area of the Peninsula are the sheath?

All comments are very appreciated,

Detlef