The definitive reference for an answer to this question is a paper by Bennet Bronson that was published in "Historical Metallurgy", Vol. 21, No.1, 1987. The paper is "Terrestrial and Meteoritic Nickel in the Indonesian Kris".
Very briefly, if the keris is not a very high class Central Javanese keris made between about 1800 and 1930 it is extremely unlikely to contain meteoritic material.
I think Mpu Djeno made a keris containing meteoritic material, Pande Keris Yantono and I made two during the 1990's, I think a couple more have been made since 2000.
Keris containing meteorite are very scarce and extremely expensive.
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