query on Jalak Budho Keris

[satsujinken]

Hello all

now it's my time to ask for your help

I was offered this keris by friend of mine

it is said to be found buried quite deep in the remote village in central java, found by a farmer digging for well - said to be found in pair. Sadly the other is said to be corroded / damaged beyond restoration.

as from the texture of the metal, which already stone-like, this was judged as Singosari Era made

but I am not sure, as the degree of preservation is somewhat too good, even though the keris already lost section of landepan (cutting edge) in the forefront section

I haven't decide whether to purchase this one or not yet
your expert opinion is expected

Donny