In some features similar keris lurus from Malay Art Gallery's sold items:
http://www.geocities.com/keris4u/ker...u_seaivory.htm
with pejetan (slightly different), sogokan, eroded greneng with ron dha nunut and eroded jenggot on a similar kembang kacang, tikel alis and sraweyan. Probably somebody can correct me.
Also for this keris blade a Sulawesi provenience is probably very questionably. It looks more like a bugis influenced culture and not bugis to me. But I must apologise, I simply have not enough knowledge to build an opinion.